ALSA: hda: Move widget capability macros into hdaudio.h

The get_wcaps() and co are used not only by HD-audio core but also
other driver code, hence it'd be better to put into the common header
instead of local.h.

OTOH, there are macros of the same name like get_wcaps() that are
still used in sound/pci/hda/* locally, and those conflict with each
other.  So we need to rename get_wcaps() (to be moved from hda-core)
with the proper snd_hdac prefix for avoiding name conflicts, and
define in the common hdaudio.h.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250709160434.1859-2-tiwai@suse.de