msm: VPU: preserve buffer sequence number

Preserve buffer sequence number from qbuf to dqbuf independently
for input/output ports.
Sequence number is not propogated from input to output.

Change-Id: I407232e332f3a6cd8b5a9092f7fd4c993557b543
Signed-off-by: Ahmed Abdul-Salam <aabdulsa@codeaurora.org>