misc: Move Mode and Translation from BaseTLB to BaseMMU

This is a step towards moving most of the TLB logic to the
MMU class.

Change-Id: Id6b1fb30aa89960705f165f9738f5b50aa1e6bdb
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/46779
Tested-by: kokoro <noreply+kokoro@google.com>
68 files changed