V4L/DVB (6912): Replace vidioc_ to bttv_

Since there are a few vidioc_ functions that were exported, rename those
functions to bttv_ in order to avoid poluting namespace.

The other functions were also renamed, to standardize inside the driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
3 files changed