mx35pdk: Allow booting a zImage kernel

Allow booting a zImage kernel.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/include/configs/mx35pdk.h b/include/configs/mx35pdk.h
index e79f76e..d89db7a 100644
--- a/include/configs/mx35pdk.h
+++ b/include/configs/mx35pdk.h
@@ -95,6 +95,7 @@
 
 #include <config_cmd_default.h>
 
+#define CONFIG_CMD_BOOTZ
 #define CONFIG_CMD_PING
 #define CONFIG_CMD_DHCP
 #define CONFIG_BOOTP_SUBNETMASK