ASoC: rt5682: fix the pop noise while OMTP type headset plugin

To turn the headphone output switch off during jack type detection, it
could avoid the pop noise when jack type switches to OMTP type.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://lore.kernel.org/r/20200623125312.27896-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>