From: Christoph Hellwig <hch@lst.de>

This one is missing updates from the v4l1 interfaces in 2.4 to the 2.6ish
v4l2 and thus doesn't compile.  While we're at it also remove the
MOD_{INC,DEC}_USE_COUNT calls in it that were bogus even in 2.4 to avoid
false positives in grep.