- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r291149, r291367:

Update the imx5/imx6 cpu_reset() implementation based on a new understanding
of the SRS (software reset) bit in the watchdog control register. Despite
what the manual seems to imply, this bit DOES trigger an immediate reset, as
opposed to simply flagging the type of reset as software-triggered.

Rename sysctl node hw.imx6 to hw.imx. Move its definition to imx_machdep.c
so that code shared between imx5 and imx6 can work with OIDs under that node.

Add last_reset_status (integer) and last_reset_reason (string) OIDs that
provide info about the last chip reset (power-on, software reset, watchdog
timeout).

MFC r273561:

Install a temporary workaround to avoid problems in fdt data with linux's
workaround for an imx6 chip erratum by using gpio1_6 as an interrupt.

MFC r271595, r271601, r271607, r271630:

Add compat strings for all the flavors of GIC this driver should support.
Also allow the driver to attach to ofwbus as well as simplebus, some FDT
data puts the root interrupt controller on the root bus.

Add a common routine for parsing FDT data describing an ARM GIC interrupt.

Use gic_decode_fdt() rather than a local routine to parse fdt interrupt
properties. Move fdt_pic_table and fdt_fixup_table into imx6_machdep.c,
which means imx6 doesn't need imx_common.c anymore.

The private peripheral interrupts start at offset 16, not 0. Also, use
names rather than inline mystery constants for these offsets.

MFC r269607, r269698:

Cache the imx6 SoC type in a static var so that it only has to be figured
out by sniffing hardware registers once.

Add a missing clock register definition.

MFC 264054, 264056

Switch imx6 to using the mpcore per-cpu event timers, but continue to use
the GPT timer, which is fixed-frequency, as a timecounter.

Change NO_EVENTTIMERS from an arm-specific to an MI option, so that it can
be used in MI code.

MFC r261982, r261987, r262123, r262244, r262278, r262280, r262353, r262354,
r262355, r262419,

Add Vybrid driver for Synchronous Audio Interface (SAI).

Decrease SAI buffer size. Handle eDMA interrupt on running channel only.

Give the physmem fdt helper routines static linkage since no global
definition of them is provided anywhere.

Add imx6 early printf support, wrapped in #if 0 because it's rarely needed.

Add basic cpu frequency control and temperature monitoring to imx6_anatop.

Add the FREEBSD_BOOT_LOADER option so that a loaded DTB passed in from
ubldr will actually get used.

Create a generic IMX6 kernel config, then fix it to have an ident line.

Don't force imx6 bootverbose on anymore, it can be set from ubldr now.

MFC r257924:

Apparently with "const uint32_t foo = 0x60;" gcc doesn't consider 'foo'
to be a constant integer suitable for use in a case label, so use #defines.

MFC r257669, r257672, r257673, r257676, r257678:

Call initarm_lastaddr() later in the init sequence, after establishing
static device mappings, rather than as the first of the initializations
that a platform can hook into. This allows a platform to allocate KVA
from the top of the address space downwards for things like static device
mapping, and return the final "last usable address" result after that and
other early init work is done.

Because some platforms were doing work in initarm_lastaddr() that needs to
be done early, add a new initarm_early_init() routine and move the early
init code to that routine on those platforms.

Make PTE_DEVICE a synonym for PTE_NOCACHE on armv4, to make it easier to
share the same code on both architectures.

Add new helper routines for arm static device mapping. The new code
allocates kva space from the top down for the device mappings and builds
entries in an internal table which is automatically used later by
arm_devmap_bootstrap(). The platform code just calls the new
arm_devmap_add_entry() function as many times as it needs to (up to 32
entries allowed; most platforms use 2 or 3 at most).

Remove imx local devmap code and use the essentially identical common
code that got moved from imx_machdep.c to arm/devmap.c.

MFC r257648, r257649, r257660:

Begin reducing code duplication in arm pmap.c and pmap-v6.c by factoring
out common code related to mapping device memory into a new devmap.c file.

Remove the growing duplication of code that used pmap_devmap_find_pa() and
then did some math with the returned results to generate a virtual address,
and likewise in reverse to get a physical address. Now there are a pair
of functions, arm_devmap_vtop() and arm_devmap_ptov(), to do that. The
bus_space_map() implementations are rewritten in terms of these.

Move remaining code and data related to static device mapping into the
new devmap.[ch] files. Emphasize the MD nature of these things by using
the prefix arm_devmap_ on the function and type names (already a few of
these things found their way into MI code, hopefully it will be harder to
do by accident in the future).

MFC r257483, r257486, r257489:

Add the Soc- / machine-dependent parts of imx6 support.
Add dts source for imx6 SoCs and for Wandboard boards.
Add kernel config for Wandboard.

Add the Soc- / machine-dependent parts of imx6 support.