usb: musb: ux500_dma: fix sparse warning

fix the following sparse warning:

drivers/usb/musb/ux500_dma.c:60:6: warning: symbol 'ux500_dma_callback' was not declared. Should it be static?

Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/ux500_dma.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -57,7 +57,7 @@ struct ux500_dma_controller {
		};

		/* Work function invoked from DMA callback to handle rx transfers. */
		void ux500_dma_callback(void *private_data)
		static void ux500_dma_callback(void *private_data)
		{
		struct dma_channel *channel = private_data;
		struct ux500_dma_channel *ux500_channel = channel->private_data;