ASoC: rt1015: Fix DC calibration on bypass boost mode

Fix the DC calibration unsuccessful issue on rt1015
bypass boost mode.

Signed-off-by: derek.fang <derek.fang@realtek.com>
Link: https://lore.kernel.org/r/1600073839-6762-1-git-send-email-derek.fang@realtek.com


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