Update ov511 driver to version 1.61:

- Remove kernel I2C support and related TV tuner code. It will
  be reimplemented correctly in the 2.x driver series
- Fix warnings when compiling without procfs support
- Fix reg_r() debug message (was printing wrong values)
- Fix printing of hex values
- Fix bogus error handling in ov51x_v4l_open()
- Improve definition of unit_video module param
- Eliminate trailing whitespace, and other code cleanups
- Remove documentation of obsolete module params