configs: sdm660: Remove pro audio capability

Remove pro audio capability in sdm660 device make file
as ultra low latency/ raw flag not supported for sdm660
audio policy.
Issues Fixed: AudioLoopbackLatency CtsVerifier test fails due to pro audio
capability with mean latency <= 20ms. Removing the pro audio feature
passes the test with mean latency <= 800 ms.

Change-Id: I15c99c05eddbdb0cdcaf094b4284a89120e6c31c