[PATCH 0//2] PowerPC: MMA+ Outer-Product Instruction name change

[Carl Love <cel@us.ibm.com>]

GDB maintainers:

The following patch set updates the mnemonics for the pmxvf16ger*,
pmxvf32ger*,pmxvf64ger*, pmxvi4ger8*, pmxvi8ger4*, pmxvi16ger2*
instructions.  

The names were officially changed to: pmdmxvf16ger*, pmdmxvf32ger*,
pmdmxvf64ger*, pmdmxvi4ger8*, pmdmxvi8ger4*,
pmdmxvi16ger* respectively in commit:

  commit bb98553cad4e017f1851153fa5de91f2cee98fb2
  Author: Peter Bergner <bergner@linux.ibm.com>
  Date:   Sat Oct 8 16:19:51 2022 -0500

    PowerPC: Add support for RFC02658 - MMA+ Outer-Product Instructions

    gas/
            * config/tc-ppc.c (md_assemble): Only check for prefix opcodes.
            * testsuite/gas/ppc/rfc02658.s: New test.
            * testsuite/gas/ppc/rfc02658.d: Likewise.
            * testsuite/gas/ppc/ppc.exp: Run it.

    opcodes/
            * ppc-opc.c (XMSK8, P_GERX4_MASK, P_GERX2_MASK, XX3GERX_MASK): New.
            (powerpc_opcodes): Add dmxvi8gerx4pp, dmxvi8gerx4, dmxvf16gerx2pp,
            dmxvf16gerx2, dmxvbf16gerx2pp, dmxvf16gerx2np, dmxvbf16gerx2,
            dmxvi8gerx4spp, dmxvbf16gerx2np, dmxvf16gerx2pn, dmxvbf16gerx2pn,
            dmxvf16gerx2nn, dmxvbf16gerx2nn, pmdmxvi8gerx4pp, pmdmxvi8gerx4,
            pmdmxvf16gerx2pp, pmdmxvf16gerx2, pmdmxvbf16gerx2pp, pmdmxvf16gerx2np,
            pmdmxvbf16gerx2, pmdmxvi8gerx4spp, pmdmxvbf16gerx2np, pmdmxvf16gerx2pn,
            pmdmxvbf16gerx2pn, pmdmxvf16gerx2nn, pmdmxvbf16gerx2nn.

The old names are still accepted as extended mnemonics by the
assembler. The disassembler outputs the new mnemonics.  The change in
the above commit resulted in about 224 test errors in test
gdb.arch/powerpc-power10.exp as the disassembled instruction names no
longer matched the expected names.

This patch set consists of two patches.  The first patch fixes the
expected instruction names in the gdb.arch/powerpc-power10.exp test as
well as the instruction names in the comments of the source file
gdb.arch/powerpc-power10.s.  The second patch updates the names of the
instructions contained in the comments of several gdb source files. 
There are no functional changes in the second patch.

The patch set has been tested on Power 10 with no regressions.

Please let me know if the various patches are acceptable.  Thanks.

                         Carl Love