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_dma.c

@@ -359,7 +359,7 @@ static int ux500_dma_controller_start(struct ux500_dma_controller *controller)
 	return 0;
 }
 
-void dma_controller_destroy(struct dma_controller *c)
+void ux500_dma_controller_destroy(struct dma_controller *c)
 {
 	struct ux500_dma_controller *controller = container_of(c,
 			struct ux500_dma_controller, controller);
@@ -367,9 +367,10 @@ void dma_controller_destroy(struct dma_controller *c)
 	ux500_dma_controller_stop(controller);
 	kfree(controller);
 }
+EXPORT_SYMBOL_GPL(ux500_dma_controller_destroy);
 
-struct dma_controller *dma_controller_create(struct musb *musb,
-					void __iomem *base)
+struct dma_controller *
+ux500_dma_controller_create(struct musb *musb, void __iomem *base)
 {
 	struct ux500_dma_controller *controller;
 	struct platform_device *pdev = to_platform_device(musb->controller);
@@ -407,3 +408,4 @@ plat_get_fail:
 kzalloc_fail:
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(ux500_dma_controller_create);