msm: vidc: Fix buffer tag issue for encoder

For encoder, copy the FW returned tags to vidc layer.
Vidc layer sends them back to client.

CRs-Fixed: 2197700
Change-Id: Ibac274d256cdb69c5819589cc1d3edf1a0cf363c
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>
Signed-off-by: Praveen Chavan <pchavan@codeaurora.org>