linux-kernel-rd

Replace Panfrost's custom memory shrinker with a common drm-shmem
memory shrinker.

Tested-by: Steven Price <steven.price@arm.com> # Firefly-RK3288
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>