greybus: operation: fix an inconsistent indent

This patch fixes an inconsistent indent.

Testing Done:
- Build & boot
Signed-off-by: David Lin <dtwlin@google.com>
Acked-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/operation.c

@@ -238,7 +238,7 @@ static void gb_operation_request_handle(struct gb_operation *operation)
 		dev_err(&connection->hd->dev,
 			"%s: failed to send response %d for type 0x%02x: %d\n",
 			connection->name, status, operation->type, ret);
-			return;
+		return;
 	}
 }