[PATCH 14/57][Arm][GAS] Add support for MVE instructions: vcadd, vcmla and vcmul

[PATCH 14/57][Arm][GAS] Add support for MVE instructions: vcadd, vcmla and vcmul

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

	* config/tc-arm.c (enum operand_parse_code): New operands.
	(parse_operands): Handle new operands.
	(do_mve_vcmul): New encoding function.
	(do_vcmla): Change to support MVE variants.
	(do_vcadd): Change to support MVE variants.
	(insns): Change existing to support MVE variants and add new.
	* testsuite/gas/arm/mve-vcadd-bad-1.d: New test.
	* testsuite/gas/arm/mve-vcadd-bad-1.l: New test.
	* testsuite/gas/arm/mve-vcadd-bad-1.s: New test.
	* testsuite/gas/arm/mve-vcadd-bad-2.d: New test.
	* testsuite/gas/arm/mve-vcadd-bad-2.l: New test.
	* testsuite/gas/arm/mve-vcadd-bad-2.s: New test.
	* testsuite/gas/arm/mve-vcmla-bad-1.d: New test.
	* testsuite/gas/arm/mve-vcmla-bad-1.l: New test.
	* testsuite/gas/arm/mve-vcmla-bad-1.s: New test.
	* testsuite/gas/arm/mve-vcmla-bad-2.d: New test.
	* testsuite/gas/arm/mve-vcmla-bad-2.l: New test.
	* testsuite/gas/arm/mve-vcmla-bad-2.s: New test.
	* testsuite/gas/arm/mve-vcmul-bad-1.d: New test.
	* testsuite/gas/arm/mve-vcmul-bad-1.l: New test.
	* testsuite/gas/arm/mve-vcmul-bad-1.s: New test.
	* testsuite/gas/arm/mve-vcmul-bad-2.d: New test.
	* testsuite/gas/arm/mve-vcmul-bad-2.l: New test.
	* testsuite/gas/arm/mve-vcmul-bad-2.s: New test.