ASoC: msm-cpe-lsm: Fix ioctl for look ahead buffering

Update the LAB (Look Ahead Buffer) ioctl as the interface has been
updated. This fixes the issue where look ahead buffering does not work
after keyword detection.

Change-Id: I44def0c55aeb4bb030ba14176cbd68db829317c0
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>