config/tc-aarch64.c: Avoid trying to parse a vector mov as immediate.

config/tc-aarch64.c: Avoid trying to parse a vector mov as immediate.

Parsing a vector mov instruction currently leads to a phantom undefined
symbol being added to the symbol table. e.g.:

       .text
       mov     x0, v0.D[0]

Produces an undefined symbol called "v0.D".

gas/ChangeLog:

2013-11-05  Will Newton  <will.newton@linaro.org>

	PR gas/16103
	* config/tc-aarch64.c (parse_operands): Avoid trying to
	parse a vector register as an immediate.

gas/testsuite/ChangeLog:

2013-11-05  Will Newton  <will.newton@linaro.org>

	* gas/aarch64/advsimd-mov-bad.d: New file.
	* gas/aarch64/advsimd-mov-bad.s: Likewise.