[ALSA] hda-codec - Fix AD1986A Lenovo auto-mute

The jack detection bit on AD1986A Lenovo N100 seems inverse from
the standard definition.  Now fixed the detection properly.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>