ASOC: bg: Enable voting for regulator from bg codec driver

BG codec driver now votes and removes its vote based on if the
system is going in suspend state or resuming. Also once the
regulator is enabled, ensure that the BG codec is configured
again with init params.

Change-Id: I026bec9919c52da03787096a1ddeb0f1d370d539
Signed-off-by: Ashish Jain <ashishj@codeaurora.org>