[AArch64][NeoverseV1] Load/Store Register Half with scaling (#222282)
On Neoverse V1, LDRH/STRH with scaling has a specific execution compared
to other LDR/STR.
Opcode | Latency | Pipelines
-------------------------------------------
Common LDR | 4 | L
LDRH with scaling | 5 | I, L
Common STR | 1 | L01, D
STRH with scaling | 2 | I, L01, D
Verified on Neoverse V1 with micro benchmarks and compared all
addressing mode variantes. Neoverse V2 is unaffected (confirmed by SOG
documentation and microbenchmarks).