media: i2c: ds90ub960: Update UB9702 init sequences

Update ub9702 RX port init sequence according to TI's latest
(non-public) documentation. The sequence is based on a Python script
provided by TI.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Jai Luthra <jai.luthra@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>