ASoC: msm: Updated the period size of Multichannel driver.

Upadate the multichannel driver period size to accomodate the
8 channels with 1536 bytes for each channel in HDMI IN use case.
Update the channels of wma according to the structure populated
by the HAL

Signed-off-by: Aviral Gupta <aviralg@codeaurora.org>
(cherry picked from commit 572d504a7a57d521bd5a823a3bb8a443ac34842a)
(cherry picked from commit a955dd94918bc4241d28053d8f6587b1c055238a)

Change-Id: Id043cbf07ff1b8a80ac0961ddeff0c1d3ff1283b
Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>