ALSA: emu10k1 - Remove "Front" controls only for STAC9758/59

Remove "Front Playback Volume" and "Front Playback Switch" from emu10k1 only
for STAC9758/59

Since commit 7eae36fbd5ea9db3d3fe0d671199121be782a5b3
      "Fix the confliction of 'Front' control",
the "Front Playback Volume" control created by commit
	edf8e4565c44bffbb4d09e8984df941d0ae9e6e8
	"emu10k1: Front channels via fxbus 8 and 9"
was removed

"Front Playback Volume" and "Surround Playback Volume" have same dB range
since I2S DAC of SB Live! and SB Live! Platinum does not has any hardware
volume control.

Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/emumixer.c

@@ -1729,8 +1729,6 @@ int __devinit snd_emu10k1_mixer(struct snd_emu10k1 *emu,
 		"Master Mono Playback Volume",
 		"PCM Out Path & Mute",
 		"Mono Output Select",
-		"Front Playback Switch",
-		"Front Playback Volume",
 		"Surround Playback Switch",
 		"Surround Playback Volume",
 		"Center Playback Switch",
@@ -1879,6 +1877,8 @@ int __devinit snd_emu10k1_mixer(struct snd_emu10k1 *emu,
 				emu->rear_ac97 = 1;
 				snd_emu10k1_ptr_write(emu, AC97SLOT, 0, AC97SLOT_CNTR|AC97SLOT_LFE|AC97SLOT_REAR_LEFT|AC97SLOT_REAR_RIGHT);
 				snd_ac97_write_cache(emu->ac97, AC97_HEADPHONE, 0x0202);
+				remove_ctl(card,"Front Playback Volume");
+				remove_ctl(card,"Front Playback Switch");
 			}
 			/* remove unused AC97 controls */
 			snd_ac97_write_cache(emu->ac97, AC97_SURROUND_MASTER, 0x0202);