ASoC: Add missing err label

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index d9faa39..83e8033 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -3881,6 +3881,7 @@
 	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;
 }