ASoC: Intel: Skylake: Fix bit depth when querying the NHLT blob

Bps calculation is not correct as this needs to be based on valid
bit depth.  16 bit fmt bit depth is 16 bit and for 24 and 32 bit
as it is container size This patch fixes the bps.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>