ALSA: hda/realtek - Fix ALC700 family no sound issue

It maybe the typo for ALC700 support patch.
To fix the bit value on this patch.

Fixes: 6fbae35a

 ("ALSA: hda/realtek - Add support for new codecs ALC700/ALC701/ALC703")
Signed-off-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>