[Morello] altbase: Remaining LD/ST

[Morello] altbase: Remaining LD/ST

LDRB, LDRH, LDRSB, LDRSH, STRB, STRH, LDURB, LDURH, STURB, STURH,
LDURSB, LDURSH, LDURSW.

gas/ChangeLog:

2020-10-20  Siddhesh Poyarekar  <siddesh.poyarekar@arm.com>

	* testsuite/gas/aarch64/morello_ldst-c64.d: Add tests.
	* testsuite/gas/aarch64/morello_ldst.d: Likewise.
	* testsuite/gas/aarch64/morello_ldst.s: Likewise.

include/ChangeLog:

2020-10-20  Siddhesh Poyarekar  <siddesh.poyarekar@arm.com>

	* opcode/aarch64.c (F_NOSHIFT): New flag.

opcodes/ChangeLog:

2020-10-20  Siddhesh Poyarekar  <siddesh.poyarekar@arm.com>

	* aarch64-asm.c (aarch64_ins_addr_uimm): Shift only if
	F_NOSHIFT is not set.
	* aarch64-tbl.h (QL2_B_ADDR, QL2_X_ADDR, QL2_H_ADDR): New
	macro.
	(aarch64_opcode_table): New instructions.
	* aarch64-asm-2.c: Regenerate.
	* aarch64-dis-2.c: Regenerate.
	* aarch64-opc-2.c: Regenerate.