disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/arch/mips/sibyte/swarm/Makefile
..
..
@@ -1,3 +1,4 @@
1
+# SPDX-License-Identifier: GPL-2.0-only
1
2
 obj-y				:= platform.o setup.o rtc_xicor1241.o \
2
3
 				   rtc_m41t81.o
3
4