kirkwood: switch to 4.4

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Signed-off-by: Luka Perkov <luka@openwrt.org>

SVN-Revision: 49020

target/linux/kirkwood/Makefile

@@ -13,7 +13,7 @@ FEATURES:=targz usb jffs2_nand nand ubifs squashfs dt
 CPU_TYPE:=xscale
 MAINTAINER:=Luka Perkov <luka@openwrt.org>
 
-KERNEL_PATCHVER:=3.18
+KERNEL_PATCHVER:=4.4
 
 include $(INCLUDE_DIR)/target.mk