orion: Switch to kernel 4.4

Signed-off-by: Florian Fainelli <[email protected]>

target/linux/orion/Makefile

@@ -13,7 +13,7 @@ FEATURES:=broken rtc
 SUBTARGETS:=generic harddisk
 MAINTAINER:=Imre Kaloz <[email protected]>
 
-KERNEL_PATCHVER:=3.18
+KERNEL_PATCHVER:=4.4
 
 include $(INCLUDE_DIR)/target.mk