sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

ps3fb: Remove unused variable.

vt: export RGB offsets with FBIO_GETRGBOFFS

Add a new ioctl to vt to make it possible to export RGB offsets
set by vt drivers. This is needed to fix colors on X and Mesa
on some machines, especially on modern PowerPC64 BE ones.

With the appropriate changes in SCFB, to use this ioctl to find
out the correct RGB offsets, this fixes wrong colors on Talos II
and Blackbird, when used with their built-in video cards.

Reviewed by: alfredo
Sponsored by: Instituto de Pesquisas Eldorado (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D29000

powerpc: clean up empty lines in .c and .h files

Fix reversed endianness that crept in at some point. Blue is now blue
instead of pink.

MFC after: 3 days

Use data from the boot loader to pick the appropriate output graphics mode
instead of hard-coding a default. This information is passed implicitly by
the PS3 firmware and can be relied upon. Also adjust the default mode, if
somehow firmware doesn't pass one, to 1920x1080 from 720x480 since it is
2017.

MFC after: 2 weeks

sys/powerpc: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

As <machine/pmap.h> is included from <vm/pmap.h>, there is no need to
include it explicitly when <vm/pmap.h> is already included.

Reviewed by: alc, kib
Differential Revision: https://reviews.freebsd.org/D5373

Add support for USB display link adapters to the FB and VT drivers.
The vtophys() function is used to get the physical page address for
the virtually allocated frame buffers when a physically continuous
memory area is not available. This change also allows removing the
masking of the FB_FLAG_NOMMAP flag in the PS3 syscons driver.

The FB and VT drivers were tested using X.org/xf86-video-scfb and
syscons.

Allow use of higher-resolution (e.g. 1920x1080) framebuffers on PS3.

MFC after: 1 month

Use FDT properties to identify a PS3 if present.

Make PS3 work with the userspace kboot loader. loader.ps3 will disappear
from the tree in the near future.

Done at: Hackathon

vt(4): Use vt_fb_drawrect() and vt_fb_setpixel() in all vt_fb-derivative

Review: https://reviews.freebsd.org/D789
Reviewed by: nwhitehorn
Approved by: nwhitehorn
MFC after: 2 days

vt(4): Add vd_bitblt_bmp_t callback

The code was already there in all backends, we just expose it. This is
used to display the splash screen.

MFC after: 1 week

vt_fb: Implement vd_bitblt_text_t for vt_fb and derivatives

MFC after: 1 week

Fix two files forgotten in r269783 (vt_generate_cons_palette)

Reported by: bz
MFC after: 1 week
MFC with: 269783

Retire vd_maskbitbltchr. The same functionality can be obtained by testing
for mask != NULL in vd_bitbltchr, which all implementations of vd_bitbltchr()
were doing anyway.

Retire various intertwined bits of fbd(4) and vt_fb, in particular the
pixel modification indirection. No actual drivers use it and those that
might (e.g. creatorfb) use custom implementations of vd_bitbltchr().

Enable X11 via xf86-video-scfb on the Playstation 3. This commit made from
an xterm running for the first time on said Playstation.

Move the PS3 framebuffer console to use vt instead of syscons and adjust
GENERIC64 for PowerPC to use vt with it.

Much to my chagrin, PS3 support seems to have bitrotted somewhat since the
last time I tried it. ehci panics on attach and interrupt handling seems
to be faulty. This should be fixed soon...

Avoid warnings about duplicate modules.

MFC after: 2 weeks

Support infrastructure for X11 on PS3.

Submitted by: geoffrey dot levand at mail dot ru
MFC after: 1 week

Import support for the Sony Playstation 3 using the OtherOS feature
available on firmwares 3.15 and earlier.

Caveats: Support for the internal SATA controller is currently missing,
as is support for framebuffer resolutions other than 720x480. These
deficiencies will be remedied soon.

Special thanks to Peter Grehan for providing the hardware that made this
port possible, and thanks to Geoff Levand of Sony Computer Entertainment
for advice on the LV1 hypervisor.