drm/komeda: Use GEM CMA object functions

Create GEM objects with drm_gem_cma_create_object_default_funcs(), which
allocates the object and sets CMA's default object functions. Corresponding
callbacks in struct drm_driver are cleared. No functional changes are made.

Driver and object-function instances use the same callback functions, with
the exception of vunmap. The implementation of vunmap is empty and left out
in CMA's default object functions.

v3:
	* convert to DRIVER_OPS macro in a separate patch
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200605073247.4057-20-tzimmermann@suse.de

drivers/gpu/drm/arm/display/komeda/komeda_kms.c

@@ -61,15 +61,11 @@ static irqreturn_t komeda_kms_irq_handler(int irq, void *data)
 static struct drm_driver komeda_kms_driver = {
 	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 	.lastclose			= drm_fb_helper_lastclose,
-	.gem_free_object_unlocked	= drm_gem_cma_free_object,
-	.gem_vm_ops			= &drm_gem_cma_vm_ops,
+	.gem_create_object		= drm_gem_cma_create_object_default_funcs,
 	.dumb_create			= komeda_gem_cma_dumb_create,
 	.prime_handle_to_fd		= drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle		= drm_gem_prime_fd_to_handle,
-	.gem_prime_get_sg_table		= drm_gem_cma_prime_get_sg_table,
 	.gem_prime_import_sg_table	= drm_gem_cma_prime_import_sg_table,
-	.gem_prime_vmap			= drm_gem_cma_prime_vmap,
-	.gem_prime_vunmap		= drm_gem_cma_prime_vunmap,
 	.gem_prime_mmap			= drm_gem_cma_prime_mmap,
 	.fops = &komeda_cma_fops,
 	.name = "komeda",