ASoC: wm8994: Fix reporting of accessory removal on WM8958

During recent refactoring the code to report removal when MICDET reports
an absent microphone was removed, causing problems for systems which rely
solely on the MICDET for this functionality. Restore it.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8994.c

@@ -3833,6 +3833,11 @@ static irqreturn_t wm8958_mic_irq(int irq, void *data)
 			dev_dbg(codec->dev, "Ignoring removed jack\n");
 			return IRQ_HANDLED;
 		}
+	} else if (!(reg & WM8958_MICD_STS)) {
+		snd_soc_jack_report(wm8994->micdet[0].jack, 0,
+				    SND_JACK_MECHANICAL | SND_JACK_HEADSET |
+				    wm8994->btn_mask);
+		goto out;
 	}
 
 	if (wm8994->mic_detecting)