Staging: go7007: saa7134 updates

- Added documentation including README files from the original go7007
  driver package.
- Added Video4Linux2 MPEG controls.
- Added Video4Linux2 audio ioctls, which pass thru to the i2c driver.
- Improved saa7134 interface, to pass thru controls and video settings.
- Fixed a bug in sony tuner, as reported by Bifferos on the Go7007 wiki.

Signed-off-by: Pete Eberlein <pete@sensoray.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>