Asoc: msm: qdsp6v2: Use the same topology for next stream

For gapless playback topology being set for next stream is not
the same topology used for previous stream.
Topology will not be null if driver is opening the next
stream using same session, so it can use same
topology for next stream.

Change-Id: Ie4206b31d9443338868c687e1dbce55140e7a86e
Signed-off-by: Preetam Singh Ranawat <apranawat@codeaurora.org>