- 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 r276444, r276445, r276470:

Fix a paste-o in dcache_inv_pou_all().

Change the order of operations for the initial cache setup.

A couple small fixes to make clang 3.5 happy... Move END(sigcode)
and other misplace ENTRY/END macros.

MFC r276394, r276397:

Add armv6 implementations of the startup-time cache maintenence functions.

Create a new locore.S that includes locore-v4 or locore-v6 as needed.

MFC r276247, r276333, r276334, r276335, r276336, r276340, r276350:

Include acle-compat.h directly rather than getting it via sysreg.h.

Add new code to read and parse cpu identification data using the new CPUID
mechanism defined for armv7.

Add new TLB and cache maintainence functions for armv6 and armv7.

Eliminate an unused macro whose name clashes now with a function in the
new cpu-v6.h

Add cache maintenance functions which will be used by startup code to
initially set up the MMU.

Fix a "decl is not a prototype" error noticed by gcc (but not clang).

Update comments (r4 is not used anywhere), use non-profiling entry macros.

Add arm option ARM_NEW_PMAP, to allow us to begin adding the new pmap
code alongside the existing implementation

Add armv6 implementations of cache operations to avoid duplication

Add cache maintenance functions which will be used by startup code to
initially set up the MMU. Some day they may also be useful as part of
suspend/resume handling, when we get better at power management.

Submitted by: Svatopluk Kraus <onwahe@gmail.com>,
Michal Meloun <meloun@miracle.cz