[RFA/ARM 06/21] Add support diagnosing UNPREDICTABLE conditional instructions

[Matthew Gretton-Dann]

Some of the new instructions in ARMv8 are UNPREDICTABLE when executed
in an IT block (these are all SIMD/FP instructions).

This patch adds infrastructure to support diagnosing these instructions
in the disassembler.

Note that the repurposing of %u in the opcode16 table is fine as it has
never been used previously.

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

	* arm-dis.c (COND_UNCOND): New constant.
	(print_insn_coprocessor): Add support for %u format specifier.
	(print_insn_neon): Likewise.
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