dma-mapping: fix the prototype of dma_unmap_single()

dma_unmap_single() takes the dma address, not virtual address.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index c506652..6ad1000 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -288,8 +288,8 @@
 	return 0;
 
 err1:
-	dma_unmap_single((void *)(uintptr_t)dwc->scratch_addr, dwc->nr_scratch *
-			 DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
+	dma_unmap_single(scratch_addr, dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
+			 DMA_BIDIRECTIONAL);
 
 err0:
 	return ret;
@@ -303,7 +303,7 @@
 	if (!dwc->nr_scratch)
 		return;
 
-	dma_unmap_single((void *)(uintptr_t)dwc->scratch_addr, dwc->nr_scratch *
+	dma_unmap_single(dwc->scratch_addr, dwc->nr_scratch *
 			 DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
 	kfree(dwc->scratchbuf);
 }