ar71xx: Fix board detection for the TP-LINK TL-MR13U.

Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44646 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ar71xx/base-files/lib/ar71xx.sh

@@ -738,7 +738,7 @@ ar71xx_board_detect() {
 	*"TL-MR12U")
 		name="tl-mr12u"
 		;;
-	*"TL-MR13U")
+	*"TL-MR13U v1")
 		name="tl-mr13u"
 		;;
 	*"Tube2H")