[openwrt/openwrt] armvirt: add 5.15 as testing kernel

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/848f112c91b54e1f7e3a591a5e4b5de8b3aa256b

commit 848f112c91b54e1f7e3a591a5e4b5de8b3aa256b
Author: Aleksander Jan Bajkowski <olek2 at wp.pl>
AuthorDate: Mon Mar 21 19:09:32 2022 +0100

    armvirt: add 5.15 as testing kernel
    
    Add 5.15 as testing kernel.
    
    Signed-off-by: Aleksander Jan Bajkowski <olek2 at wp.pl>
---
 target/linux/armvirt/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/armvirt/Makefile b/target/linux/armvirt/Makefile
index 21d8f04d9e..6a2587fb38 100644
--- a/target/linux/armvirt/Makefile
+++ b/target/linux/armvirt/Makefile
@@ -10,6 +10,7 @@ FEATURES:=fpu pci rtc usb
 FEATURES+=cpiogz ext4 ramdisk squashfs targz
 
 KERNEL_PATCHVER:=5.10
+KERNEL_TESTING_PATCHVER:=5.15
 
 include $(INCLUDE_DIR)/target.mk