[PATCH 22.03] ath79: image: allow changing kernel option in mkubntimage

[Tomasz Maciej Nowak]

From: Tomasz Maciej Nowak <tmn505 at gmail.com>

Backport didn't include changes to mkubntimage invocation, which allowed
to pass arguments. This in result produces broken routerstation factory
images, which have kernel embedded as kernel partition instead of LZMA
loader.

Fixes: #13260
Fixes: 8e09f9ffc3cc ("ath79: switch some RedBoot based devices to OKLI loader")
Signed-off-by: Tomasz Maciej Nowak <tmn505 at gmail.com>
---
 target/linux/ath79/image/common-ubnt.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/linux/ath79/image/common-ubnt.mk b/target/linux/ath79/image/common-ubnt.mk
index 625f0b4f3f12..76d6de000ba6 100644
--- a/target/linux/ath79/image/common-ubnt.mk
+++ b/target/linux/ath79/image/common-ubnt.mk
@@ -10,7 +10,7 @@ UBNT_REVISION := $(VERSION_DIST)-$(REVISION)
 define Build/mkubntimage
 	-$(STAGING_DIR_HOST)/bin/mkfwimage -B $(UBNT_BOARD) \
 		-v $(UBNT_TYPE).$(UBNT_CHIP).v6.0.0-$(VERSION_DIST)-$(REVISION) \
-		-k $(IMAGE_KERNEL) -r $@ -o $@
+		-k $(if $(1),$(1),$(IMAGE_KERNEL)) -r $@ -o $@
 endef
 
 define Build/mkubntimage2
-- 
2.41.0