soc: swr-mstr: Enable dual-mic SVA for ULP2 mode

Dual-Mic SVA in ULP2 mode has noise. 
Enable DIV2 bit based on enabled bank to resolve the issue.

Change-Id: Icb35153924b972e0197a2b2b4142b5bffb787823
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>