ramips: correct keenetic-series switch index

Fix switch name typo

Signed-off-by: Vitaly Chekryzhev <[email protected]>

target/linux/ramips/base-files/etc/board.d/02_network

@@ -213,7 +213,7 @@ ramips_setup_interfaces()
 		;;
 	kn_rc|\
 	kn_rf)
-		ucidef_add_switch "switch" \
+		ucidef_add_switch "switch0" \
 			"0:wan" "1:lan" "2:lan" "3:lan" "4:lan" "6@eth0"
 		;;
 	kng_rc)