Fix some more print() format errors.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index cc7c5ba..9e38bf7 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -886,9 +886,9 @@
 				return 1;
 			}
 
-			printf ("\nNAND %s: device %d offset %ld, size %ld ...\n",
+			printf ("\nNAND %s: device %d offset %ld, size %lu ...\n",
 				(cmd & NANDRW_READ) ? "read" : "write",
-				curr_device, off, size);
+				curr_device, off, (ulong)size);
 
 			ret = nand_legacy_rw (nand_dev_desc + curr_device,
 					      cmd, off, size,