[ALSA] hda-codec - Add missing #defines (and 1 rename) in hda_codec.h

Added AC_VERB_GET_DIGI_CONVERT_2 and renamed AC_VERB_GET_DIGI_CONVERT to
AC_VERB_GET_DIGI_CONVERT_1 to stay consistent with the SET variants. Added
AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK, AC_VERB_SET_GPIO_UNSOLICITED_RSP_MASK,
and AC_PINCAP_LR_SWAP. The missing fields were listed in the ALC883 datasheet
rev 1.3.

Signed-off-by: Andrew Paprocki <andrew@ishiboo.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>