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>

drivers/dma/apbh_dma.c

@@ -606,7 +606,7 @@ int mxs_dma_wait_complete(uint32_t timeout, unsigned int chan)
 		mxs_dma_reset(chan);
 	}
 
-	return 0;
+	return ret;
 }
 
 /*