msm: vidc: Lower priority of log messages

Lower the priority of log messages printed out by driver when unhandled
packets are encountered.  Also if there is a failiure during power
collapse, the respective log messages are now warnings as failiure to
power collapse isn't fatal.

Change-Id: Ie298442caae41309d02e7deaf13f954b3e78c096
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>