ALSA: hda/realtek: Add missing fixup-model entry for Gigabyte X570 ALC1220 quirks

The initial commit of the new Gigabyte X570 ALC1220 quirks lacked the
fixup-model entry in alc882_fixup_models[]. It seemed not to cause any ill
effects but for completeness sake this commit makes up for that.

Signed-off-by: Christian Lachner <gladiac@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220129113243.93068-2-gladiac@gmail.com


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