For VT1708S and VT1702, deactivate "Headphone Playback Volume" and
"Headphone Playback Mute" control if "Independent HP" mode is OFF.
and rename VT1702 "Independent HP" text.
Signed-off-by: NLydia Wang <lydiawang@viatech.com.cn>
Signed-off-by: NLogan Li <loganli@viatech.com.cn>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>