USB: HCD: Add usb_hcd prefix to exported functions

The convention is to prefix symbols exported from the USB HCD core with
"usb_hcd".  This change makes unmap_urb_setup_for_dma() and
unmap_urb_for_dma() consistent with that.

Signed-off-by: Robert Morell <rmorell@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 4d5bcb4..4d2f3f7 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1336,7 +1336,7 @@
 	if (length > qh->maxpacket)
 		length = qh->maxpacket;
 	/* Unmap the buffer so that CPU can use it */
-	unmap_urb_for_dma(musb_to_hcd(musb), urb);
+	usb_hcd_unmap_urb_for_dma(musb_to_hcd(musb), urb);
 	musb_write_fifo(hw_ep, length, urb->transfer_buffer + offset);
 	qh->segsize = length;
 
@@ -1758,7 +1758,7 @@
 
 		if (!dma) {
 			/* Unmap the buffer so that CPU can use it */
-			unmap_urb_for_dma(musb_to_hcd(musb), urb);
+			usb_hcd_unmap_urb_for_dma(musb_to_hcd(musb), urb);
 			done = musb_host_packet_rx(musb, urb,
 					epnum, iso_err);
 			DBG(6, "read %spacket\n", done ? "last " : "");