drm/amd/display: Return directly after a failed kzalloc() in dc_create()

* Return directly after a call of the function “kzalloc” failed
  at the beginning.

* Delete a label which became unnecessary with this refactoring.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -964,8 +964,8 @@ struct dc *dc_create(const struct dc_init_data *init_params)
 	struct dc *dc = kzalloc(sizeof(*dc), GFP_KERNEL);
 	unsigned int full_pipe_count;
 
-	if (NULL == dc)
-		goto alloc_fail;
+	if (!dc)
+		return NULL;
 
 	if (init_params->dce_environment == DCE_ENV_VIRTUAL_HW) {
 		if (false == dc_construct_ctx(dc, init_params)) {
@@ -1009,8 +1009,6 @@ struct dc *dc_create(const struct dc_init_data *init_params)
 
 construct_fail:
 	kfree(dc);
-
-alloc_fail:
 	return NULL;
 }