ramips: add support for D-Link DWR-960

The DWR-960 Wireless Router is based on the MT7620A SoC.

Specification:

- MediaTek MT7620A (580 Mhz)
- 128 MB of RAM
- 16 MB of FLASH
- 1x 802.11bgn radio
- 1x 802.11ac radio (MT7610 mpcie card)
- 4x 10/100 Mbps Ethernet (1 WAN and 3 LAN)
- 1x 10/100/1000 Mbps Ethernet (1 LAN) (AR8035)
- 2x internal, non-detachable antennas (Wifi 2.4G)
- 3x external, detachable antennas (2x LTE, 1x Wifi 5G)
- 1x LTE modem
- UART (J4) header on PCB (57600 8n1)
- 9x LED, 2x button
- JBOOT bootloader

Known issues:
- Flash is extremely slow.

Installation:
Apply factory image via http web-gui or JBOOT recovery page

How to revert to OEM firmware:
- push the reset button and turn on the power. Wait until LED start
  blinking (~10sec.)
- upload original factory image via JBOOT http (IP: 192.168.123.254)

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>

target/linux/ramips/image/mt7620.mk

@@ -279,6 +279,20 @@ define Device/dlink_dwr-922-e2
 endef
 TARGET_DEVICES += dlink_dwr-922-e2
 
+define Device/dlink_dwr-960
+  $(Device/amit_jboot)
+  SOC := mt7620a
+  IMAGE_SIZE := 16256k
+  DEVICE_VENDOR := D-Link
+  DEVICE_MODEL := DWR-960
+  DLINK_ROM_ID := DLK6E2429001
+  DLINK_FAMILY_MEMBER := 0x6E24
+  DLINK_FIRMWARE_SIZE := 0xFE0000
+  DEVICE_PACKAGES += kmod-usb-net-qmi-wwan kmod-usb-serial-option uqmi \
+	kmod-mt76x0e
+endef
+TARGET_DEVICES += dlink_dwr-960
+
 define Device/dovado_tiny-ac
   SOC := mt7620a
   IMAGE_SIZE := 7872k