msm: vidc: Initialize max cf and max cr values

CF and CR cannot be zero. Initialization of Min/Max values
keeps the values within limits, when FW does not provide them.
Also, do not modify CF, CR value based on DCVS. Always use
worst case values.

CRs-Fixed: 2467542
Change-Id: I91ed83cb5c9e1a8cda5775c491d99b97c4043a12
Signed-off-by: Chinmay Sawarkar <chinmays@codeaurora.org>