Specifying I2C pins and adding datasheet for USB7216C
Specifying I2C pins and adding datasheet for USB7216C

Signed-off-by: Greg Balke <79e2475f81a6317276bf7cbb3958b20d289b78df@openrobotics.org>

osrf/osrf_hw,osrf/osrf_hw,osrf/osrf_hw