ALSA: hda/realtek - Support Dell headset mode for ALC298

[ Upstream commit 977e627684df0f60bdf2a768ec4772f42fe843fc ]

Dell create new platform with ALC298 codec.
This patch will enable headset mode for ALC298/ALC3266 platform.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>