msm: vidc: configure bus frequency using update_devfreq

Currently video driver calls resume_devfeq for voting the
bus frequency, though the device is not in suspended state.
Due to recent strict check added in dev_freq framework,
resum_devfreq updates the frequecny only if device is in
suspended state. Hence using the correct API to configure
bus frequency using update_devfreq.

Change-Id: I96a8d9978f20c28f306b88d40951595fa9c3cdc9
Signed-off-by: Priyanka Gujjula <pgujjula@codeaurora.org>