DCA: Cocci spatch "ptr_ret.spatch"

diff -u -p a/drivers/dca/dca-sysfs.c b/drivers/dca/dca-sysfs.c
@@ -40,9 +40,7 @@ int dca_sysfs_add_req(struct dca_provide
 
 	cd = device_create(dca_class, dca->cd, MKDEV(0, slot + 1), NULL,
 			   "requester%d", req_count++);
-	if (IS_ERR(cd))
-		return PTR_ERR(cd);
-	return 0;
+	return PTR_RET(cd);
 }
 
 void dca_sysfs_remove_req(struct dca_provider *dca, int slot)