SN9C10x driver updates.

Changes:

@ Fix the sysfs interface
@ Fix allocated minor number after device detection
+ Add "force_munmap" module parameter
+ Documentation updates
+ Add support for old VIDIOC_S_PARM_OLD and VIDIOC_S_CTRL_OLD ioctl's
Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>