drm/pl111: Introduce GEM object functions

GEM object functions deprecate several similar callback interfaces in
struct drm_driver. This patch replaces the per-driver callbacks with
per-instance callbacks in pl111. The only exception is gem_prime_mmap,
which is non-trivial to convert.

v2:
	* use drm_gem_cma_create_object_default_funcs() (Eric)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200923102159.24084-13-tzimmermann@suse.de

drivers/gpu/drm/pl111/pl111_drv.c

@@ -224,15 +224,12 @@ static struct drm_driver pl111_drm_driver = {
 	.major = 1,
 	.minor = 0,
 	.patchlevel = 0,
+	.gem_create_object = drm_gem_cma_create_object_default_funcs,
 	.dumb_create = drm_gem_cma_dumb_create,
-	.gem_free_object_unlocked = drm_gem_cma_free_object,
-	.gem_vm_ops = &drm_gem_cma_vm_ops,
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 	.gem_prime_import_sg_table = pl111_gem_import_sg_table,
-	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
 	.gem_prime_mmap = drm_gem_cma_prime_mmap,
-	.gem_prime_vmap = drm_gem_cma_prime_vmap,
 
 #if defined(CONFIG_DEBUG_FS)
 	.debugfs_init = pl111_debugfs_init,