nvl32: Add nvl32 target

Also adds an i2c device class to allow us to send raw i2c

Tested:
ran on the nvl32-obmc model and i2c devices were enumerated correctly.
as well as mctp devices

Change-Id: I073156de2bbe06b06017379de35e076166df3875
Signed-off-by: Marc Olberding <molberding@nvidia.com>
6 files changed