asoc: tegra-alt: add kcontrol to set i2s bitwidth

asoc: tegra-alt: add kcontrol to set i2s bitwidth

Audience require 32 bits/channel for power optimized routes.

Added k-control to update 12S bit width. This change will also take care
of converting XBAR_BITS to CLIENT_BITS by padding zeros from LFSR to LSB

DAI format is hardcoded to 32 bits in Audience codec driver.

Bug 200118587

Change-Id: I3cf35977e8ba57d83084bd86ae6a2720a6acde7e
Signed-off-by: Srinivas Anne <sanne@nvidia.com>
Reviewed-on: http://git-master/r/830893
GVS: Gerrit_Virtual_Submit
Reviewed-by: Pierre Gervais <pgervais@nvidia.com>