m68k: Use dma_addr_t for scatterlist.dma_address

dma_addr_t (as was used by m68knommu) is more correct than u32.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/include/asm/scatterlist.h

@@ -11,7 +11,7 @@ struct scatterlist {
 	unsigned int offset;
 	unsigned int length;
 
-	__u32 dma_address;	/* A place to hang host-specific addresses at. */
+	dma_addr_t dma_address;	/* A place to hang host-specific addresses at. */
 };
 
 /* This is bogus and should go away. */