[openwrt/openwrt] d1: add 6.12 kernel as testing

[LEDE Commits]

wigyori pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/b3c76f182157221a15083078eaea0556f4596519

commit b3c76f182157221a15083078eaea0556f4596519
Author: Zoltan HERPAI <wigyori at uid0.hu>
AuthorDate: Mon May 5 23:24:15 2025 +0200

    d1: add 6.12 kernel as testing
    
    Allow selecting 6.12 as testing kernel on d1.
    
    Runtime-tested:
     - Nezha D1
    
    Signed-off-by: Zoltan HERPAI <wigyori at uid0.hu>
---
 target/linux/d1/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/d1/Makefile b/target/linux/d1/Makefile
index a60af57afa..7bd9b936aa 100644
--- a/target/linux/d1/Makefile
+++ b/target/linux/d1/Makefile
@@ -12,6 +12,7 @@ KERNELNAME:=Image dtbs
 SUBTARGETS:=generic
 
 KERNEL_PATCHVER:=6.6
+KERNEL_TESTING_PATCHVER:=6.12
 
 include $(INCLUDE_DIR)/target.mk