ASoC: au1x: dbdma2: plug memleak in pcm device creation error path

free the allocated pcm platform device in the error path.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/au1x/dbdma2.c b/sound/soc/au1x/dbdma2.c
index 2ca33b0..19e4d37 100644
--- a/sound/soc/au1x/dbdma2.c
+++ b/sound/soc/au1x/dbdma2.c
@@ -480,6 +480,7 @@
 	if (!ret)
 		return pd;
 
+	platform_device_put(pd);
 out:
 	kfree(res);
 	return NULL;