BACKPORT: radv: make sure FMASK compression is enabled for MSAA copies

Fixes dEQP-VK.api.copy_and_blit.*.4_bit. I think the MSAA2x and
MSAA8x just passed by luck.

Fixes: 7b21ce401f7 ("radv: disable FMASK compression when drawing with GENERAL layout")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7915>
(cherry picked from commit 2d0c723ce661bf45f6c5286c0671ab0eb138081a)

BUG=b:179946107
TEST=Compile tested & upstream

Change-Id: I227a66c415c186a4e89fa72c98ef78db22e0db62
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/mesa/+/2692694
Tested-by: Bas Nieuwenhuizen <basni@chromium.org>
Reviewed-by: Drew Davenport <ddavenport@chromium.org>
Commit-Queue: Bas Nieuwenhuizen <basni@chromium.org>
2 files changed