drm/xe: Set mask bits for CCS_MODE register

CCS_MODE register requires setting mask bits from Xe2+ platforms. Set
the mask bits unconditionally, as those bits are unused for older
platforms.

Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Cc: stable@vger.kernel.org # v6.11+
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241008073628.377433-2-balasubramani.vivekanandan@intel.com


Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 23ea2c75)
[ Fix conflict with mmio refactors ]
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>