ARM: DTS: enable MIC BIAS as on demand supply on all targets

Update codec node to enable the mic bias as on demand supply
for all the targets.

CRs-Fixed: 965952
Change-Id: I6eedff242f7e59143e17ec88397abc1267d18c8e
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>