Some Flat instructions were reporting their operand sizes in bits instead of bytes. This lead to panics occuring in StaticRegisterManagerPolicy::mapVgpr. This patch updates those insts to report their operand sizes in bytes. Change-Id: I48f485e638864a1f2a1a3be66ed20893e73e9705 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/36275 Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Reviewed-by: Alexandru Duțu <alexandru.dutu@amd.com> Maintainer: Matt Sinclair <mattdsinclair@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>