bpf: gas,opcodes: fix pseudoc syntax for MOVS* and LDXS* insns

bpf: gas,opcodes: fix pseudoc syntax for MOVS* and LDXS* insns

This patch fixes the pseudoc syntax of the V4 instructions MOVS* and
LDXS* in order to reflect https://reviews.llvm.org/D144829.

opcodes/ChangeLog:

2023-07-24  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* bpf-opc.c (bpf_opcodes): Fix pseudo-c syntax for MOVS* and LDXS*
	instructions.

gas/ChangeLog:

2023-07-24  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* doc/c-bpf.texi (BPF Instructions): Fix pseudoc syntax for MOVS*
	and LDXS* instructions.
	* testsuite/gas/bpf/mem-pseudoc.d: Likewise.
	* testsuite/gas/bpf/mem-be-pseudoc.d: Likewise.
	* testsuite/gas/bpf/mem-pseudoc.s: Likewise.
	* testsuite/gas/bpf/alu-pseudoc.s: Likewise.
	* testsuite/gas/bpf/alu-pseudoc.d: Likewise.
	* testsuite/gas/bpf/alu-be-pseudoc.d: Likewise.
	* testsuite/gas/bpf/alu32-pseudoc.s: Likewise.
	* testsuite/gas/bpf/alu32-pseudoc.d: Likewise.
	* testsuite/gas/bpf/alu32-be-pseudoc.d: Likewise.