Hi,

This patch adds support for MVE instructions VADDLV and VADDV.

gas/ChangeLog:

2019-05-01  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* config/tc-arm.c (M_MNEM_vaddlv, M_MNEM_vaddlva, M_MNEM_vaddv,
         M_MNEM_vaddva): New instruction encodings.
	(mve_encode_rq): New encoding helper function.
	(do_mve_vaddlv): New encoding function.
	(do_mve_vaddv): New encoding function.
	* testsuite/gas/arm/mve-vaddlv-bad.d: New test.
	* testsuite/gas/arm/mve-vaddlv-bad.l: New test.
	* testsuite/gas/arm/mve-vaddlv-bad.s: New test.
	* testsuite/gas/arm/mve-vaddv-bad.d: New test.
	* testsuite/gas/arm/mve-vaddv-bad.l: New test.
	* testsuite/gas/arm/mve-vaddv-bad.s: New test.