AR7: add support for Titan TNETV10xx SoC

Hi Ralf,

These two patches add support for the Texas Instrument TNETV10xx SoC (aka Titan) variant. Since the chip is almost identical to ar7, only a couple of places had to be modified. This is 2.6.37 material. Thanks!

Florian Fainelli (2):
AR7: initialize GPIO earlier
AR7: add support for Titan (TNETV10xx) SoC variant