ramips: add D-Link DIR-620 A1 support

Full functionality runtime tested, installation via OEM web-interface requires
a follow-up patch.

Thanks go to Sergey Vasilyugin for his patch that pointed me at the missing
bits (including the antiparallel wps led).

Signed-off-by: Paul Fertser <fercerpav@gmail.com>

SVN-Revision: 33142

target/linux/ramips/base-files/lib/preinit/06_set_iface_mac

@@ -13,6 +13,7 @@ preinit_set_mac_address() {
 		ifconfig eth0 hw ether $mac 2>/dev/null
 		;;
 	bc2 |\
+	dir-620-a1 |\
 	esr-9753 |\
 	freestation5 |\
 	nw718 |\

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

@@ -80,6 +80,9 @@ ramips_board_name() {
 	*"DIR-600 B2")
 		name="dir-600-b2"
 		;;
+	*"DIR-620 A1")
+		name="dir-620-a1"
+		;;
         *"DAP-1350")
                 name="dap-1350"
                 ;;

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

@@ -21,6 +21,7 @@ platform_check_image() {
 	dir-300-b1 | \
 	dir-600-b1 | \
 	dir-600-b2 | \
+	dir-620-a1 | \
 	dap-1350 | \
 	esr-9753 | \
 	fonera20n | \