x86: Use kernel 4.14 by default

Support for kernel 4.14 was added 2 months ago, make it now the default
kernel to use for the x86 target.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Tested-by: Stijn Segers <francesco.borromini@inventati.org>

target/linux/x86/Makefile

@@ -13,7 +13,7 @@ FEATURES:=squashfs ext4 vdi vmdk pcmcia targz fpu
 SUBTARGETS:=generic legacy geode 64
 MAINTAINER:=Felix Fietkau <nbd@nbd.name>
 
-KERNEL_PATCHVER:=4.9
+KERNEL_PATCHVER:=4.14
 
 KERNELNAME:=bzImage