ramips: add support for STORYLiNK SAP-G3200U3

STORYLiNK SAP-G3200U3 is an AC1200 router based on MT7621AT+MT7602EN+MT7612EN.
It has 128MB DDR3, 8MB NOR FLASH, 5-port Gbps switch and 1x USB 3.0.

The following patch adds support for this device.

Tested and working:
* ethernet
* both WiFi radios
* USB 3.0
* buttons
* ethernet switch and USB diag LEDs
* UART
* GPIOs

Tested and not working:
* LEDs for WiFi radios (connected with WiFi chips, not supported in mt76?)
* failsafe mode (known problem, needs workaround like other MTK based devices)

More information in Wiki: http://wiki.openwrt.org/toh/storylink/sap-g3200u3

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

SVN-Revision: 46454

target/linux/ramips/mt7621/profiles/sap-g3200u3.mk

@@ -0,0 +1,18 @@
+#
+# Copyright (C) 2015 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+define Profile/SAP-G3200U3
+	NAME:=STORYLiNK SAP-G3200U3
+	PACKAGES:=\
+		kmod-usb-core kmod-usb3 kmod-usb-hid \
+		kmod-ledtrig-usbdev
+endef
+
+define Profile/SAP-G3200U3/Description
+	Package set compatible with the STORYLiNK SAP-G3200U3 board.
+endef
+$(eval $(call Profile,SAP-G3200U3))