ar71xx: add support for dir 505 a1

this patch is based on ...

-> https://forum.openwrt.org/viewtopic.php?pid=179902#p179902

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 37703

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

@@ -243,6 +243,9 @@ ar71xx_board_detect() {
 	*"DB120 reference board")
 		name="db120"
 		;;
+	*"DIR-505 rev. A1")
+		name="dir-505-a1"
+		;;
 	*"DIR-600 rev. A1")
 		name="dir-600-a1"
 		;;
@@ -396,6 +399,9 @@ ar71xx_board_detect() {
 	*TL-WR2543N*)
 		name="tl-wr2543n"
 		;;
+	*DIR-505-A1)
+		name="dir-505-a1"
+		;;
 	*"DIR-615 rev. C1")
 		name="dir-615-c1"
 		;;