hal : Fix for CtsNatvieMediaAAudioTestCases module failures

Reason for failure was, measured latency was more
than the expected value for deep buffer usecase.

Set the period count to 2 instead 3 for deep buffer
usecase to improve platform latency

CRs-Fixed: 2201278
Change-Id: I847b6f054fc3507cce3c752ff8d91c1ba01767e7