[openwrt/openwrt] sifiveu: add 6.12 kernel as testing

[LEDE Commits]

wigyori pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/60b5cfdf5a0678c115dd2e8a70368ce2c0f20058

commit 60b5cfdf5a0678c115dd2e8a70368ce2c0f20058
Author: Zoltan HERPAI <wigyori at uid0.hu>
AuthorDate: Fri May 2 15:31:58 2025 +0200

    sifiveu: add 6.12 kernel as testing
    
    Allow selecting 6.12 as testing kernel on sifiveu.
    
    Runtime-tested:
     - HiFive Unleashed (FU540)
     - HiFive Unmatched (FU740)
    
    Signed-off-by: Zoltan HERPAI <wigyori at uid0.hu>
---
 target/linux/sifiveu/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/sifiveu/Makefile b/target/linux/sifiveu/Makefile
index 2e2ea96b4b..70c6f433d9 100644
--- a/target/linux/sifiveu/Makefile
+++ b/target/linux/sifiveu/Makefile
@@ -12,6 +12,7 @@ KERNELNAME:=Image dtbs
 SUBTARGETS:=generic
 
 KERNEL_PATCHVER:=6.6
+KERNEL_TESTING_PATCHVER:=6.12
 
 include $(INCLUDE_DIR)/target.mk