fastmodel: Implement readVecRegFlat for ArmThreadContext.

This just calls readVecReg after constructing a RegId.

Change-Id: Ia26b9bb874fec62f98bd5e4d3c6aa1059766c2f6
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23783
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
2 files changed