post_proc: disable adsp reverb when preset is 'None'

Audio HAL set corresponding preset id into adsp, but doesn't disabe
reverb explicitly when 'None' preset is chosen. However, preset=0
means custom preset in adsp, so adsp won't stop reverb processing.

Change-Id: I0c42dd13c09579a6bd3bef2141b857477ec65f2e
CRs-Fixed: 604982
1 file changed