[openwrt/openwrt] ath79: tiny: add 5.15 support for tiny subtarget

[LEDE Commits]

blocktrron pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/ae6bfb7d67c12a4e9d2c1e3f6366de5cef7b61e3

commit ae6bfb7d67c12a4e9d2c1e3f6366de5cef7b61e3
Author: Nick Hainke <vincent at systemli.org>
AuthorDate: Tue Aug 23 18:44:21 2022 +0200

    ath79: tiny: add 5.15 support for tiny subtarget
    
    Tested on Ubiquiti Nanostation M5 XM with low_mem.
    
    Signed-off-by: Nick Hainke <vincent at systemli.org>
---
 target/linux/ath79/tiny/target.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/linux/ath79/tiny/target.mk b/target/linux/ath79/tiny/target.mk
index 28e02f7a67..8241aacd3a 100644
--- a/target/linux/ath79/tiny/target.mk
+++ b/target/linux/ath79/tiny/target.mk
@@ -3,6 +3,8 @@ FEATURES += low_mem small_flash
 
 DEFAULT_PACKAGES += wpad-basic-wolfssl
 
+KERNEL_TESTING_PATCHVER:=5.15
+
 define Target/Description
 	Build firmware images for Atheros AR71xx/AR913x/AR934x based boards with small flash
 endef