ar71xx: dragino2: add missing sysupgrade support.

The original dragino2 board support was missing some changes from the
upstream svn repository (http://svn.dragino.com/dragino2) that supported
sysupgrade.

[juhosg: change subject]

Signed-off-by: Karl Palsson <karlp@remake.is>
Patchwork: http://patchwork.openwrt.org/patch/4801/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 39429

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

@@ -279,6 +279,9 @@ ar71xx_board_detect() {
 	*"DIR-835 rev. A1")
 		name="dir-835-a1"
 		;;
+	*"Dragino v2")
+		name="dragino2"
+		;;
 	*EAP7660D)
 		name="eap7660d"
 		;;

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

@@ -149,6 +149,7 @@ platform_check_image() {
 	dir-615-e4 | \
 	dir-825-c1 | \
 	dir-835-a1 | \
+	dragino2 | \
 	ew-dorin | \
 	ew-dorin-router | \
 	hornet-ub-x2 | \