ramips: add support for D-Link DAP-1522 A1

D-Link DAP-1522 is a wireless bridge/access point with 4 LAN
ports and a dual-band wireless chipset.

Specifications:
- Ralink RT2880
- 32 MB of RAM
- 4 MB of Flash
- 4x 10/100/1000 Mbps Ethernet (RTL8366SR)
- 802.11abgn (RT2850)

Flash Instructions:
1. Download lede-ramips-rt288x-dap-1522-a1-squashfs-factory.bin
2. Open the web interface and upload the image

Signed-off-by: George Hopkins <george-hopkins@null.net>

package/system/mtd/src/Makefile

@@ -11,7 +11,7 @@ obj.brcm = trx.o
 obj.brcm47xx = $(obj.brcm)
 obj.bcm53xx = $(obj.brcm) $(obj.seama)
 obj.brcm63xx = imagetag.o
-obj.ramips = $(obj.seama)
+obj.ramips = $(obj.seama) $(obj.wrg)
 obj.mvebu = linksys_bootcount.o
 obj.kirkwood = linksys_bootcount.o
 obj.ipq806x = linksys_bootcount.o