mmc: mxcmmc: add missing dma_async_issue_pending

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 4184b79..f35b6ba 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -267,6 +267,7 @@
 	wmb();
 
 	dmaengine_submit(host->desc);
+	dma_async_issue_pending(host->dma);
 
 	return 0;
 }