cpu: Use range based for loops to iterate over RegClass-s.

Change-Id: Ie42ad814a5a90cb635fb4f92d46c8a8c6abeb6a6
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/49781
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