fixup! rust: drm: gem: shmem: Add DRM shmem helper abstraction

kernel API change: add optional drm_gem_object_funcs.rss function ptr

Signed-off-by: Janne Grunau <j@jannau.net>
(cherry picked from commit 1272721 https://github.com/AsahiLinux/linux)
Signed-off-by: John Cabaj <john.cabaj@canonical.com>

Author: jannau

rust/kernel/drm/gem/shmem.rs

@@ -149,6 +149,7 @@ impl<T: DriverObject> Object<T> {
         vunmap: Some(bindings::drm_gem_shmem_object_vunmap),
         mmap: Some(bindings::drm_gem_shmem_object_mmap),
         status: None,
+        rss: None,
         vm_ops: &SHMEM_VM_OPS,
         evict: None,
     };