rk3328_codec: remove diagostic printfs

Most likeyly there were intended as reminders for unimplemented functions,
but they do not seem to be useful.

Also, a small style nit.

syscon: Move syscon code in dev/syscon

We've removed kernel option EXT_RESOURCES almost two years ago.
While it was ok to have some code under a common 'extres' subdirectory
at first, we now have a lot of consumer of it and we made it mandatory
so no need to have it under a cryptic name.

Reviewed by: mhorne
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D43196

clk: Move clock code in dev/clk

We've removed kernel option EXT_RESOURCES almost two years ago.
While it was ok to have some code under a common 'extres' subdirectory
at first, we now have a lot of consumer of it and we made it mandatory
so no need to have it under a cryptic name.

Reviewed by: mhorne
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D43191

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/

sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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

arm64 rockchip: Remove unused devclass arguments to DRIVER_MODULE.

rk3328_codec: set output gain to the value found in linux

According to Linux code the new value should correspond to 0dB gain
while the original value corresponded to 6dB gain which may be
uncomfortable for some output types.

MFC after: 1 month

rk3328_codec: add delays between register writes in the initial setup

MFC after: 1 month

rk3328_codec: bump delays in set_power and set_mute

According to Linux they should be 10 ms, not 10 us.
Also, add a read before the second write in set_power.

MFC after: 1 month

rk3328_codec: fix a problem with the enable value

The previous value contained only the mask bit ("twice"),
but not the value bit.

While here, make a couple of lines a little bit prettier.

MFC after: 1 month

add rk3328_codec and rk_i2s from gonzoua/socaudio

Not sure why these haven't been committed with the rest of the SoC Audio
project. They work sufficiently well for me.

Discussed with: manu
MFC after: 1 month