lantiq: kernel 4.14: copy patches, config and dts files

This just copies the patches, configuration and dts files into the
directories hich are used for kernel 4.14.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/lantiq/files-4.14/arch/mips/boot/dts/TDW8970.dts

@@ -0,0 +1,8 @@
+/dts-v1/;
+
+#include "TDW89X0.dtsi"
+
+/ {
+	compatible = "tplink,tdw8970", "tplink,tdw89x0", "lantiq,xway", "lantiq,vr9";
+	model = "TP-LINK TD-W8970";
+};