msm: vidc: Use inbuilt math function for doing division operation

Division of 64bit dividend is causing compilation failure
for 32bit kernel. Using math function to support division for
both 64 and 32-bit kernels.

Change-Id: Ia12d55c49e7c2448a9125154a56a2d36159b8857
Signed-off-by: Vikas Reddy Pachika <vpachi@codeaurora.org>