msm: vidc: Modify multislice config before start

- Cap number of slices to max 10.
- Slice supported only for H264 and H265 with,
 ratecontrol CBR or RCOFF.
- MB based slice is supported upto UHD 60fps.
- Byte based slice is supported upto 1080p 30fps.

CRs-Fixed: 2259088
Change-Id: I92235237521713a6a2ca7fedd8336e18264d3f21
Signed-off-by: Chinmay Sawarkar <chinmays@codeaurora.org>