msm: vidc: Queue DPB buffer after session continue

After flush if instance is in reconfig mode then the
driver doesn't queue DPB buffers resulting into only OPB
buffers with FW. So after flush if we get session continue
command the FW doesn't process due to lack of DPB buffers.
Queuing the DPB buffers after session continue in reconfig
mode will resolve this issue.

CRs-Fixed: 2163853
Change-Id: I8e6ce55a5fb26983ff9bf5a5da87a0033a8d9a8e
Signed-off-by: Prateek Shrivastava <pshrivas@codeaurora.org>