ASoC: msm: Rampup volume on each start

Rampup volume on each trigger start call to compress driver.
This helps in reducing pops heard by the listener after a seek/pause+resume

Change-Id: I0d82c5a9a8ed2b64683e8c0855da2208c90d8199
Signed-off-by: Haynes Mathew George <hgeorge@codeaurora.org>
CRs-Fixed: 692337