ASoC: wcd9xxx: move DCE_Z recalibration after mic measurements

Recalibrating DCE/STA gnd voltages in the middle of DC
Estimate for mic voltage will cause problem due to micbias
pull down and then pull up. The measured mic voltage probably
is not at its steadystate value due to slow ramp up of micbias.
Calibrate these DCE/STA gnd voltages only after taking all the
DCE measurements required to classify the accessory type.

CRs-Fixed: 731148
Change-Id: I70c022655f7915f815bb3772e0cbbe71b3b32c5b
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>