ALSA: hda - add explicit include of err.h

Since every caller of snd_hda_jack_detect_enable_callback needs to
use the macros from err.h, it makes sense to include it directly
from hda_jack.h.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>