msm: vidc: Fix codec config frame with EOS flag issue

This change fixes the issue with improper handling of
codec config frame with eos flag in smooth streaming
scenario.

CRs-fixed: 467211
Change-Id: Iafd0a1a5a9073458fd139ed5845585747e51be8a
Signed-off-by: Deepak Verma <dverma@codeaurora.org>