ASoC: wcd934x: Set micbias curr to higher value when micb is enabled

When micbias is enabled set curr to higher value for
vreg bob bypass and when it is disabled set it
to default value for sm6150.

CRs-Fixed: 2315478
Change-Id: I451506002f382e666d47bc83944bdc8dbbedcad8
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>