yabel: Don't cast pointer to u32

Change-Id: I45b3412263507d92f443743d2ee63c9a8ef94795
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/12114
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/device/oprom/yabel/biosemu.c

@@ -170,7 +170,7 @@ biosemu(u8 *biosmem, u32 biosmem_size, struct device * dev, unsigned long rom_ad
 				break;
 			}
 			clr_ci();
-			my_wrb((u32)mem_img + i, c);
+			my_wrb((uintptr_t)mem_img + i, c);
 		}
 #endif
 		copy_count++;