usb: musb: Set up function pointers for DMA

Set up function pointers for DMA so get closer to
being able to build in all the DMA engines.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/ux500.c

@@ -189,6 +189,10 @@ static int ux500_musb_exit(struct musb *musb)
 
 static const struct musb_platform_ops ux500_ops = {
 	.quirks		= MUSB_DMA_UX500 | MUSB_INDEXED_EP,
+#ifdef CONFIG_USB_UX500_DMA
+	.dma_init	= ux500_dma_controller_create,
+	.dma_exit	= ux500_dma_controller_destroy,
+#endif
 	.init		= ux500_musb_init,
 	.exit		= ux500_musb_exit,
 	.fifo_mode	= 5,