- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r274670, r274671, r276168:

Moves all the duplicate code to a single function.

Verify for invalid modes and unwanted flags before pass the new flags to
driver.

Make gpio_default_map_gpios() static. No functional changes.

Improves the GPIO API description a little bit.

gpio_pin_max must return the maximum supported pin number and not the total
number of pins on the system.

MFC r273799:

Make the GPIO children attach to the first unit available and not only to
unit 0.

This fix a bug where a GPIO controller could fail to attach its children
(gpioc and gpiobus) if another GPIO driver attach first.

MFC r270945:

Rename OF_xref_phandle() to OF_node_from_xref() and add a new function
that provides the inverse translation, OF_xref_from_node().

MFC r257200, r259121, r261410, r265853:

- Remove #include <machine/frame.h>.
- Add gpio parse routines according to sys/boot/fdt/dts/bindings-gpio.txt.
- Follow r261352 by updating all drivers which are children of simplebus
to check the status property in their probe routines.
- Rename platform_gpio_init to be SoC specific, and make it static as it's
only called from this file.

This is mostly catching up on some old MFCs that were done before this file
existed in the 10 branch.

MFC 263631, 263637, 263664, 263676, 263679, 263698, 263711,

Implement __flt_rounds for ARMv6 hard-float. The fpscr register stores the
current rounding mode used by the VFP unit.

Simplify how we build MACHINE_ARCH. There are 3 options that may be set
however only arm, armeb, armv6, and soon armv6hf will be used.

Add the llvm/clang patch for r263619.

Reorder the pmap macros so "ARM_MMU_V6 + ARM_MMU_V7" is first. As they are
identical this allows us to build for both v6 and v7 together.

Add code for enabling second CPU core for A20 SoC.
Enable SMP on Cubieboard2.

Switch to freebsd.org emal address in copyright.

MFC r261410

Follow r261352 by updating all drivers which are children of simplebus
to check the status property in their probe routines.

MFC r257199, r257200, r257217:

Remove all #include <machine/pmap.h> from arm code. It's already
included by vm/pmap.h, which is a prerequisite for arm/machine/pmap.h
so there's no reason to ever include it directly.

Remove #include <machine/frame.h> from all the arm code that doesn't
really need it. That would be almost everywhere it was included. Add
it in a couple files that really do need it and were previously getting
it by accident via another header.

Remove the last dregs of trapframe_t. It turns out only arm was using
this type, so remove it to make arm code more consistant with other
platforms.

MFC r256949: Import basic support for Rockchip RK3188 SoC.

Import basic support for Rockchip RK3188 SoC.

Reviewed by: ray@