msm: vidc: Change packet memory to static allocation mode

In response handler, packet memory is allocated dynamically due
to large allocation size. Sometimes this may take long time and
cause timeouts. Hence make the packet allocation as static with
reduced size. With this code coverage will not work due to less
packet size. Hence deprecate the code coverage support.

Change-Id: Ieb7303f6ff9296980723b6afc0a376230408015c
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>