ASoC: Update Compress driver as per ASoC framework expecatations

Update compress platform driver to match ASoC framework
expectation.
Drain and Partial Drain commands should not wait as the wait
needed is already taken care of in the SoC framework.

Change-Id: I44be253204a69a005b208d8a805d8e9108c0846c
Signed-off-by: Satish Babu Patakokila <sbpata@codeaurora.org>