apbh_dma: return error value on timeout

When a timeout occurs, the return value is prepared but never returned.
Fix that.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/drivers/dma/apbh_dma.c b/drivers/dma/apbh_dma.c
index 69a1042..4000974 100644
--- a/drivers/dma/apbh_dma.c
+++ b/drivers/dma/apbh_dma.c
@@ -606,7 +606,7 @@
 		mxs_dma_reset(chan);
 	}
 
-	return 0;
+	return ret;
 }
 
 /*