SN9C10x driver updates.

Changes: + new, - removed, * cleanup, @ bugfix

@ Remove bad get_ctrl()'s
* Documentation updates
+ Add 0x0c45/0x602d to the list of SN9C10x based devices
+ Add support for OV7630 image sensors
Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>