sparc: Move the mem base classes out of the ISA description.

Change-Id: Ifbeee464e2d7f872e192f065ad3494f52d274596
Reviewed-on: https://gem5-review.googlesource.com/5482
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
8 files changed