Revert "CHROMIUM: Disable RHWO optimization on gen12"

This reverts commit f59356058cd7dbebd0faeb41a07f6acbc7e97ed3.
BUG=b:253750548, b:246324780
TEST=Build

Change-Id: I45ce35d08738347139911feb43fb84774ecbe430
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/mesa/+/3971024
Commit-Queue: Ilja Friedel <ihf@chromium.org>
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Ilja Friedel <ihf@chromium.org>
2 files changed