mem-cache: Set prefetch bit if the blk comes from Prefetch only.

Original logic setting prefetch inside serviceMSHRTargets
did not exclude the blks that both came from CORE and Prefetch

Change-Id: Iab56b9266eb64baf972b160774aca0823faea458
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/54364
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Daniel Carvalho <odanrc@yahoo.com.br>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed