ALSA: hda - Remove analog mic pin override from STAC9228 dell-bios quirk

The current fixup for dell-bios model with STAC9228 codec contains the
override of pin 0x0c for analog mic. But this is actually just adding
a bogus pin and confuses the parser. Better to remove it for the
auto-mic switching.

Meanwhile, for a possible regression, keep the old configuration as
model=dell-bios-amic, so that people can test it again quickly.

Tested on Dell 1420n laptop.

Reported-and-tested-by: Eric Shattow <[e-mail]>
Signed-off-by: Takashi Iwai <[e-mail]>

Documentation/sound/alsa/HD-Audio-Models.txt

···
   5stack-no-fp	D965 5stack without front panel
   dell-3stack	Dell Dimension E520
   dell-bios	Fixes with Dell BIOS setup
+  dell-bios-amic Fixes with Dell BIOS setup including analog mic
   volknob	Fixes with volume-knob widget 0x24
   auto		BIOS setup (default)
 

sound/pci/hda/patch_sigmatel.c

···
 	STAC_D965_VERBS,
 	STAC_DELL_3ST,
 	STAC_DELL_BIOS,
+	STAC_DELL_BIOS_AMIC,
 	STAC_DELL_BIOS_SPDIF,
 	STAC_927X_DELL_DMIC,
 	STAC_927X_VOLKNOB,
···
 	[STAC_DELL_BIOS] = {
 		.type = HDA_FIXUP_PINS,
 		.v.pins = (const struct hda_pintbl[]) {
-			/* configure the analog microphone on some laptops */
-			{ 0x0c, 0x90a79130 },
 			/* correct the front output jack as a hp out */
 			{ 0x0f, 0x0227011f },
 			/* correct the front input jack as a mic */
···
 		},
 		.chained = true,
 		.chain_id = STAC_927X_DELL_DMIC,
+	},
+	[STAC_DELL_BIOS_AMIC] = {
+		.type = HDA_FIXUP_PINS,
+		.v.pins = (const struct hda_pintbl[]) {
+			/* configure the analog microphone on some laptops */
+			{ 0x0c, 0x90a79130 },
+			{}
+		},
+		.chained = true,
+		.chain_id = STAC_DELL_BIOS,
 	},
 	[STAC_DELL_BIOS_SPDIF] = {
 		.type = HDA_FIXUP_PINS,
···
 	{ .id = STAC_D965_5ST_NO_FP, .name = "5stack-no-fp" },
 	{ .id = STAC_DELL_3ST, .name = "dell-3stack" },
 	{ .id = STAC_DELL_BIOS, .name = "dell-bios" },
+	{ .id = STAC_DELL_BIOS_AMIC, .name = "dell-bios-amic" },
 	{ .id = STAC_927X_VOLKNOB, .name = "volknob" },
 	{}
 };