[why]
Need it for some OEM I2C devices in Nv10

[how]
Link up code to parse OEM table and expose DC interface
to access the pins
Signed-off-by: NJun Lei <Jun.Lei@amd.com>
Reviewed-by: NAric Cyr <Aric.Cyr@amd.com>
Acked-by: NBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>