ASoC: wsa881x: Update register cache while getting temperature

Temperature from wsa881x thermal zone sensor is not correct
when wsa881x codec is in suspend state. Bring codec out of
reset and update register cache to read proper temperature
value from thermal zone sensor.

Change-Id: I428ba35cbc10fd6c8ac80f6eb26f218466f44ebc
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>