[openwrt/openwrt] siflower: add support for Linux 6.12

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/e73c4a72f45602b31688ee33a70fc89a01888b53

commit e73c4a72f45602b31688ee33a70fc89a01888b53
Author: Zhu Yujie <libriunc at gmail.com>
AuthorDate: Wed Nov 19 16:46:07 2025 +0800

    siflower: add support for Linux 6.12
    
    Set KERNEL_TESTING_PATCHVER to allow testing Linux 6.12.
    
    Signed-off-by: Zhu Yujie <libriunc at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/20555
    Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 target/linux/siflower/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/siflower/Makefile b/target/linux/siflower/Makefile
index dc3a45b384..0278092213 100644
--- a/target/linux/siflower/Makefile
+++ b/target/linux/siflower/Makefile
@@ -8,6 +8,7 @@ FEATURES:=squashfs usb usbgadget
 SUBTARGETS:=sf19a2890 sf21
 
 KERNEL_PATCHVER:=6.6
+KERNEL_TESTING_PATCHVER:=6.12
 
 include $(INCLUDE_DIR)/target.mk