[ALSA] hda-codec - Don't build boost controls for digital mics

The ALC auto-probe creates mic boost controls automatically for the
probed pins, but it assumes that they are analog mics.  The digital
mics have no boost controls and must be skipped.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/hda/patch_realtek.c

@@ -6111,15 +6111,15 @@ static int alc_auto_add_mic_boost(struct hda_codec *codec)
 	hda_nid_t nid;
 
 	nid = spec->autocfg.input_pins[AUTO_PIN_MIC];
-	if (nid) {
+	if (nid && (get_wcaps(codec, nid) & AC_WCAP_IN_AMP)) {
 		err = add_control(spec, ALC_CTL_WIDGET_VOL,
 				  "Mic Boost",
 				  HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_INPUT));
 		if (err < 0)
 			return err;
 	}
 	nid = spec->autocfg.input_pins[AUTO_PIN_FRONT_MIC];
-	if (nid) {
+	if (nid && (get_wcaps(codec, nid) & AC_WCAP_IN_AMP)) {
 		err = add_control(spec, ALC_CTL_WIDGET_VOL,
 				  "Front Mic Boost",
 				  HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_INPUT));