brcm63xx: add support for the Actiontec R1000H gateway

brcm63xx: add support for the Actiontec R1000H gateway

SOC: Broadcom BCM6368 (2 * Broadcom BMIPS4350 V3.1 / 400 MHz)
Flash size: 32MB (split 16/16 dual boot)
RAM size: 64MB
Wireless: BCM432x 802.11a/b/g/n(pci)
Ethernet: Broadcom BCM53115
USB: 1 x USB 2.0

Known issues:
 - Unable to detect 53115 switch attached to MDIO. Not supported
 - No support for the cable port

More info on the device and the research can be found at:
http://www.actiontec.com/212.html

Same FCC ID as:
https://wikidevi.com/wiki/Actiontec_V1000H_(Telus)

Signed-off-by: Anthony Sepa <anthonysepa@yahoo.ca>
[jonas.gorski: fix commit subject/message]
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>