ARM: dts: msm: Correct the mic bias for VA DMICs

Correct the mic bias mapping for VA DMICs in
wcd938x codec based target to fix single mic
SVA detection issue.

Change-Id: I77f007883f179ce4104a5adc51b479bf835112f6
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>