ALSA: hda - Add jack pointer and unsolicited event bits to callback

ALSA: hda - Add jack pointer and unsolicited event bits to callback

For allowing the callee to evaluate the associated jack information
and the unsolicited event data, add the new fields to
hda_jack_callback.  They can be used, for example, to retrieve the
headset button state in the callback.

Signed-off-by: Takashi Iwai <tiwai@suse.de>