[PATCH, BINUTILS, AARCH64, 1/9] Add -march=armv8.5-a and related internal feature...

[PATCH, BINUTILS, AARCH64, 1/9] Add -march=armv8.5-a and related internal feature macros

This patch is part of the patch series to add support for ARMv8.5-A
extensions.
(https://developer.arm.com/products/architecture/cpu-architecture/a-profile/exploration-tools)

This is the first of the patch series and adds -march=armv8.5-a and
other internal feature marcos needed for it.

2018-10-09  Sudakshina Das  <sudi.das@arm.com>

    * config/tc-aarch64.c (aarch64_archs): New entry for armv8.5-a.
    * doc/c-aarch64.texi: Add documentation for the same.

*** include/ChnageLog ***

2018-10-09  Sudakshina Das  <sudi.das@arm.com>

    * opcode/aarch64.h (AARCH64_FEATURE_V8_5): New.
    (AARCH64_ARCH_V8_5): New.

*** opcodes/ChangeLog ***

2018-10-09  Sudakshina Das  <sudi.das@arm.com>

    * aarch64-tbl.h (aarch64_feature_set aarch64_feature_v8_5): New.
    (ARMV8_5, V8_5_INSN): New.