lantiq: switch to kernel 4.9

Signed-off-by: Edward O'Callaghan <[email protected]>

target/linux/lantiq/Makefile

@@ -12,7 +12,7 @@ FEATURES:=squashfs
 SUBTARGETS:=xrx200 xway xway_legacy falcon ase
 MAINTAINER:=John Crispin <[email protected]>
 
-KERNEL_PATCHVER:=4.4
+KERNEL_PATCHVER:=4.9
 
 define Target/Description
 	Build firmware images for Lantiq SoC