Fix bug in 8641hpcn reset command with no args.

Signed-off-by: Haiying Wang <haiying.wang@freescale.com>
Acked-by: Jon Loeliger <jdl@freescale.com>
diff --git a/board/mpc8641hpcn/mpc8641hpcn.c b/board/mpc8641hpcn/mpc8641hpcn.c
index c6b2a5b..2626ccc 100644
--- a/board/mpc8641hpcn/mpc8641hpcn.c
+++ b/board/mpc8641hpcn/mpc8641hpcn.c
@@ -269,7 +269,7 @@
 	/*
 	 * No args is a simple reset request.
 	 */
-	if (argv <= 0) {
+	if (argc <= 1) {
 		out8(PIXIS_BASE + PIXIS_RST, 0);
 		/* not reached */
 	}