ASoC: rt1011: fix DC calibration offset not applying

There are two issues to fix:
- DC offset calibration data will be reset after stopping playback.
- DC offset calibration data should be applied in the initial setting.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://lore.kernel.org/r/20190711082214.8142-1-shumingf@realtek.com


Signed-off-by: Mark Brown <broonie@kernel.org>