- 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 r268838, r277644:

Add support for Toradex Apalis i.MX6 development board.

Add support for imx6 audio transmitting, include drivers for:
o Digital Audio Multiplexer (AUDMUX)
o Smart Direct Memory Access Controller (SDMA)
o Synchronous Serial Interface (SSI)

MFC r271097, r271100, r271101, r271102, r271124:

- Add a basic iomux driver for imx6.
- Implement the same public interface in imx51 and imx6 iomux
- The iomux driver is no longer optional, remove it from kernel configs.
- Implement the imx_iomux_get/set_gpr() interface for imx6.
- Stop setting the iomux device status to disabled, now that we have a driver.

MFC r268973, r268977: Rename i.MX I2C driver file, enable it on imx6.

MFC r268834, r268835:

o Enable GPIO device driver for i.MX6.
It was originally written for i.MX5 and compatible with newer chip.
o Extend device tree information
o style(9) fixes
o Rename gpio driver file.

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 262614, 262625, 262626, 262627, 262682, 262714, 262725, 262736

Integrate device-tree upstream files into the build process:
(1) Invoke cpp to bring in files via #include (although the old
/include/ stuff is supported still).
(2) bring in files from either vendor tree or freebsd-custom files
when building.
(3) move all dts* files from sys/boot/fdt/dts to
sys/boot/fdt/dts/${MACHINE} as appropriate.
(4) encode all the magic to do the build in sys/tools/fdt/make_dtb.sh
so that the different places in the tree use the exact same logic.
(5) switch back to gpl dtc by default. the bsdl one in the tree has
significant issues not easily addressed by those unfamiliar with
the code.

Only try to build the static dtb when we're building a static dtb.

Use proper include path for dtc as well as cpp.

Fix syntax errors (missing ; other minor glitches) in existing dts files.

Integrate device-tree upstream files into the build process:
(1) Invoke cpp to bring in files via #include (although the old
/include/ stuff is supported still).
(2) bring in files from either vendor tree or freebsd-custom files
when building.
(3) move all dts* files from sys/boot/fdt/dts to
sys/boot/fdt/dts/${MACHINE} as appropriate.
(4) encode all the magic to do the build in sys/tools/fdt/make_dtb.sh
so that the different places in the tree use the exact same logic.
(5) switch back to gpl dtc by default. the bsdl one in the tree has
significant issues not easily addressed by those unfamiliar with
the code.

Add basic cpu frequency control and temperature monitoring to imx6_anatop.

The temperature monitor device is enabled to sample the die temperature at
16hz. The temperature is published via sysctl. A callout routine at 10hz
monitors the temperature and throttles back the cpu if the temperature
goes over a user-settable throttle point (by default 10C less than the
critical high-point temperature for the chip). The hardware is supposed
to be able to deliver an interrupt when the temperature exceeds a settable
limit, but the interrupt never arrives so for now a callout does the job.

At attach time we read the maximum cpu frequency the chip is allowed to run
at and the cpu is set to run at that speed. It's reported at attach time.
A sysctl variable reports the current speed when queried.

New sysctl values:

dev.imx6_anatop.0.cpu_mhz: 984
dev.imx6_anatop.0.temperature: 37.9C
dev.imx6_anatop.0.throttle_temperature: 95.0C

Steven Lawrance did the initial heavy lifting on this, but I changed
enough stuff that I'm the one to blame if anything breaks.

Submitted by: Steven Lawrance <stl@koffein.net>

Add a driver to provide access to imx6 on-chip one-time-programmble data.

Submitted by: Steven Lawrance <stl@koffein.net>

Add standard non-removable and cd-gpios properties to the usdhc devices.
That generates references to gpio devices, so uncomment them even though
there isn't a gpio driver to do anything with them yet.

Add dts source for imx6 SoCs and for Wandboard boards.

The imx6.dtsi is incomplete, but has enough to support devices that work
right now. Eventually it will need to be split into several files that
account for the differences between SoCs in the imx6 family.

The board config for Wandboard Dual is untested. Solo and Quad work, but
one one core is turned on for the quad right now (baby steps).