mem-garnet: Add masked functionalRead support

Recently the CHI protocol was introduced in Ruby.
The protocol introduces an alternative interface for
functional reads:

bool functionalRead(PacketPtr, WriteMask&)

This commit adds functionalRead(PacketPtr, WriteMask&)
implementations for various Garnet components.

Change-Id: Idd571899d679407b7b000c1a83a0a5420868cf28
Signed-off-by: Carlos Falquez <c.falquez@fz-juelich.de>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/46900
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Tiago Muck <tiago.muck@arm.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
20 files changed