mx6qsabre_common: Allow booting a zImage kernel

Allow booting a zImage kernel.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

include/configs/mx6qsabre_common.h

@@ -72,6 +72,7 @@
 /* Command definition */
 #include <config_cmd_default.h>
 
+#define CONFIG_CMD_BOOTZ
 #undef CONFIG_CMD_IMLS
 
 #define CONFIG_BOOTDELAY               3