V4L/DVB (7812): 2.6.25-rc5-mm1 specifc div64_u64 fixes

Rename a few more div64_u64 which are only in -mm.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>