ARMv8 adds various 2-operand SHA instructions.

This patch adds support for them.

gas/ChangeLog:
2012-08-23  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* config/tc-arm.c (ARM_ENC_TAB): Add sha1h and sha2op entries.
	(do_sha1h): New function.
	(do_sha1su1): Likewise.
	(do_sha256su0): Likewise.
	(insns): Add 2 operand SHA instructions.

gas/testsuite/ChangeLog:
2012-08-23  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* gas/arm/armv8-a+crypto.s: Update testcase.
	* gas/arm/armv8-a+crypto.d: Likewise.

opcodes/ChangeLog:
2012-08-23  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* arm-dis.c (neon_opcodes): Add 2 operand sha instructions.