Straighten out the clamp control configurations for the various video modes,
based off of register diffs done against the Hauppauge Windows driver.

This work was sponsored by GetWellNetwork Inc.
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>