ARM: dts: msm: update audio setting for SDM450 QRD device

On SDM450 QRD device, headset is using external micbias and
has cap on it. Update audio setting for it to resolve headset
detection issue.

Change-Id: Id049ec3447acd074e7f5b6832772458153a8b72e
Signed-off-by: Meng Wang <mwang@codeaurora.org>