ASoC: wcd9xxx: Enable PWR_SWCH_OVRD to reduce noise

If headset is inserted slowly, polling noise is heard
for 5 sec. To reduce the level of polling noise set bit2
in 0x133 register.

CRs-Fixed: 578695
Change-Id: Ic56a545730d8a435fe7fe66009dd3fd7022b249e
Signed-off-by: Yeleswarapu, Nagaradhesh <nagaradh@codeaurora.org>