ramips: Add support for Netgear EX6130

Specifications:
* SoC: MT7620A
* RAM: 64 MB DDR
* Flash: 8MB NOR SPI flash
* WiFi: MT7612E (5Ghz) and builtin MT7620A (2.4GHz)
* LAN: 1x100M

The -factory images can be flashed from the
device's web interface

The device seems to be an EU variant of EX3700/EX3800
and AC1200.

Signed-off-by: Frederik Noe-Sdun <[email protected]>

OpenWrt v18.06.4 Release

OpenWrt v18.06.3 Release

LEDE v17.01.7 Release

OpenWrt v18.06.2 Release

LEDE v17.01.6 Release

OpenWrt v18.06.1 Release

OpenWrt v18.06.0 Release

OpenWrt v18.06.0-rc2 Release

LEDE v17.01.5 Release