[llvm][AArch64][Assembly]: Add FP8FMA assembly and disassembly. (#70134)
This patch adds the feature flag FP8FMA and the assembly/disassembly
for the following instructions of NEON and SVE2:
* NEON:
- FMLALBlane
- FMLALTlane
- FMLALLBBlane
- FMLALLBTlane
- FMLALLTBlane
- FMLALLTTlane
- FMLALB
- FMLALT
- FMLALLB
- FMLALLBT
- FMLALLTB
- FMLALLTT
* SVE2:
- FMLALB_ZZZI
- FMLALT_ZZZI
- FMLALB_ZZZ
- FMLALT_ZZZ
- FMLALLBB_ZZZI
- FMLALLBT_ZZZI
- FMLALLTB_ZZZI
- FMLALLTT_ZZZI
- FMLALLBB_ZZZ
- FMLALLBT_ZZZ
- FMLALLTB_ZZZ
- FMLALLTT_ZZZ
That is according to this documentation:
https://developer.arm.com/documentation/ddi0602/2023-09