[PATCH 25/57][Arm][GAS] Add support for MVE instruction: vmvn, vqabs and vqneg

[PATCH 25/57][Arm][GAS] Add support for MVE instruction: vmvn, vqabs and vqneg

gas/ChangeLog:
2019-05-16  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* config/tc-arm.c (do_neon_mvn): Change to accept MVE variants.
	(do_neon_sat_abs_neg): Likewise.
	(insns): Likewise.
	* testsuite/gas/arm/mve-vmvn-bad.d: New test.
	* testsuite/gas/arm/mve-vmvn-bad.l: New test.
	* testsuite/gas/arm/mve-vmvn-bad.s: New test.
	* testsuite/gas/arm/mve-vqabsneg-bad.d: New test.
	* testsuite/gas/arm/mve-vqabsneg-bad.l: New test.
	* testsuite/gas/arm/mve-vqabsneg-bad.s: New test.