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

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/53b213b99b9ff801336a44354b9f163847b2a13b

commit 53b213b99b9ff801336a44354b9f163847b2a13b
Author: Tianling Shen <cnsztl at immortalwrt.org>
AuthorDate: Fri May 2 19:11:43 2025 +0800

    rockchip: add kernel 6.12 as testing kernel
    
    Add kernel 6.12 as testing kernel.
    
    Signed-off-by: Tianling Shen <cnsztl at immortalwrt.org>
    Link: https://github.com/openwrt/openwrt/pull/18683
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/rockchip/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/rockchip/Makefile b/target/linux/rockchip/Makefile
index 26af6855ac..0364c55a32 100644
--- a/target/linux/rockchip/Makefile
+++ b/target/linux/rockchip/Makefile
@@ -8,6 +8,7 @@ FEATURES:=ext4 audio usb usbgadget display gpio fpu pci pcie rootfs-part boot-pa
 SUBTARGETS:=armv8
 
 KERNEL_PATCHVER:=6.6
+KERNEL_TESTING_PATCHVER:=6.12
 
 define Target/Description
 	Build firmware image for Rockchip SoC devices.