msm: vidc: Set dpb count for smooth streaming

The min_dpb required for smooth streaming is set for the
max requirement of 1080p playback session. This is set in
vidc platform data in the device file.

(cherry picked from commit 885fcc57354cd309f5ed0356da486d1e130b9ad7)
CRs-fixed: 408738
Signed-off-by: Mohan Kumar Gubbihalli Lachma Naik <mgubbi@codeaurora.org>

Change-Id: I38c3c9931f573cb029871bd48fd161f2158e139e
Signed-off-by: Neha Pandey <nehap@codeaurora.org>