mxs: bump to use 4.14 by default

Signed-off-by: Zoltan HERPAI <[email protected]>

target/linux/mxs/Makefile

@@ -13,7 +13,7 @@ FEATURES:=ext4 rtc usb gpio
 CPU_TYPE:=arm926ej-s
 
 MAINTAINER:=Zoltan HERPAI <[email protected]>
-KERNEL_PATCHVER:=4.9
+KERNEL_PATCHVER:=4.14
 KERNELNAME:=zImage dtbs
 
 define Target/Description