This patch introduces support for Netgear WNDR4500v3. Router
is very similar to WNDR4300v2 and is based on the same PCB.
Information gathered from various Internet sources (including
https://patchwork.ozlabs.org/patch/809227/) shows following
differences to WNDR4300v2:
* two USB 2.0 ports with separate LEDs
* USB LEDs soldered to secondary pads
* WPS and RFKILL buttons soldered to secondary pads
* described as N900 device with 3x3:3 MIMO for 2.4GHz radio
* power supply requirement is DC 12V 2.5A
* vendor HW ID suffix differs in one digit
* bigger chassis
Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
