ASoC: Add missing err label

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8994.c

@@ -3881,6 +3881,7 @@ err_irq:
 	wm8994_free_irq(wm8994->wm8994, WM8994_IRQ_FIFOS_ERR, codec);
 	wm8994_free_irq(wm8994->wm8994, WM8994_IRQ_TEMP_SHUT, codec);
 	wm8994_free_irq(wm8994->wm8994, WM8994_IRQ_TEMP_WARN, codec);
+err:
 	return ret;
 }