msm: qdsp5v2: Increase buffersize of hostPCM interface. 

The default audio sample rate of audioflinger is increased
from 44.1k to 48k.Increase the buffersize to take
advantage of that.

Change-Id: I7ffc6c697cb32b6983c9bb5cc6ea73a7a55b5006
Signed-off-by: Sidipotu Ashok <sashok@codeaurora.org>