usb: musb: ux500: copy dma mask from platform device to musb device

musb code checks dma mask before calling dma hooks.

Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c
index d6384e4..f7e04bf 100644
--- a/drivers/usb/musb/ux500.c
+++ b/drivers/usb/musb/ux500.c
@@ -93,6 +93,8 @@
 	}
 
 	musb->dev.parent		= &pdev->dev;
+	musb->dev.dma_mask		= pdev->dev.dma_mask;
+	musb->dev.coherent_dma_mask	= pdev->dev.coherent_dma_mask;
 
 	glue->dev			= &pdev->dev;
 	glue->musb			= musb;