ASoC: msm8x16-wcd: fix the extra power used during the suspend case

Power down the static supplies during the suspend and power the
supplies back in the resume. This approach reduces the power
numbers during the suspend use cases.

CRs-Fixed: 671163
Change-Id: Ib03a460b1517f66e992b6655f9b4d29a8df63a7c
Signed-off-by: Aviral Gupta <aviralg@codeaurora.org>