mem-ruby: Make bitSelect use bits<Addr>

mem-ruby: Make bitSelect use bits<Addr>

There is no need to replicate bits<Addr>' functionality.

As a side effect, ADDRESS_WIDTH is no longer used and was removed

Change-Id: Ia5679f3976c81f779665d82cb758850092f2a293
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/21085
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>