mx53ard: Place machine ID into board config

Let common code set the machine ID.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/include/configs/mx53ard.h b/include/configs/mx53ard.h
index c0b8d6a..26fc219 100644
--- a/include/configs/mx53ard.h
+++ b/include/configs/mx53ard.h
@@ -29,6 +29,8 @@
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_DISPLAY_BOARDINFO
 
+#define CONFIG_MACH_TYPE	MACH_TYPE_MX53_ARD
+
 #include <asm/arch/imx-regs.h>
 
 #define CONFIG_CMDLINE_TAG			/* enable passing of ATAGs */