ARM: dts: msm: change ref threhold to 184K in sdm660

sdm660 has comparator circuit addded in mic path. When headset
is connected comparator output is 186mv instead of 0 which
is effecting headset detection. To resolve this change moisture
detection threshold to 184_K.

CRs-Fixed: 1099543
Change-Id: I79382da8715227ccf737f1a54b358ab95be63419
Signed-off-by: Yeleswarapu Nagaradhesh <nagaradh@codeaurora.org>