msm: vidc: Supress non fatal Session errors

FW sends SESSION_ERROR for various reasons. The session error
might not be fatal always. This is conveyed using event_data1.
Driver needs to process this message and supress non fatal
errors and reports only fatal errors to clients.

Change-Id: If9ded26977805e2c2299ef1c4a63212d2679495c
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>