ASoC: msm: qdsp6v2: issue PAUSE command before FLUSH

DSP is returning error for FLUSH command.
ASM_STREAM_CMD_FLUSH commad needs to be send on a
PAUSE stream, issue PAUSE command before FLUSH
command.

CRs-Fixed: 2075656
Change-Id: Id24a0398d761b08b31b0a340368ab2a4516d3636
Signed-off-by: Surendar karka <sukark@codeaurora.org>