Ensure that the TLB of the OA unit is also invalidated
on gen12 HW, as just invalidating the TLB of an engine is not
enough.

Cc: stable@vger.kernel.org
Fixes: 7938d615 ("drm/i915: Flush TLBs before releasing backing store")
Signed-off-by: NChris Wilson <chris.p.wilson@intel.com>
Cc: Fei Yang <fei.yang@intel.com>
Reviewed-by: NAndi Shyti <andi.shyti@linux.intel.com>
Acked-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: NThomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: NAndi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/59724d9f5cf1e93b1620d01b8332ac991555283d.1658924372.git.mchehab@kernel.org
(cherry picked from commit dfc83de1)
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>