starfive: add 6.12 as testing kernel

Runtime-tested on:
 - Visionfive v2-1.3b (JH7110)
 - Visionfive v1 (JH7100)

Signed-off-by: Zoltan HERPAI <[email protected]>

target/linux/starfive/Makefile

@@ -11,6 +11,7 @@ FEATURES:=ext4
 KERNELNAME:=Image dtbs
 
 KERNEL_PATCHVER:=6.6
+KERNEL_TESTING_PATCHVER:=6.12
 
 include $(INCLUDE_DIR)/target.mk