ASoC: Lahaina: correction to CPS payload

CPS Threshold values to be written to the slave device were not properly packed.
Code change to correct the payload as per the specification.

Change-Id: Ie5bbfca0875d16467160f96d20219c4946f81a72
Signed-off-by: Vangala, Amarnath <avangala@codeaurora.org>