igep00x0: Enable CONFIG_CMD_BOOTZ

With v3.9 and later of the Linux Kernel defaulting to multi-platform
images with omap2plus_defconfig, uImage isn't builtable anymore by
default.  Add CONFIG_CMD_BOOTZ so that we can still boot something the
kernel spits out.

Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>

include/configs/igep00x0.h

@@ -55,7 +55,8 @@
 #define CONFIG_INITRD_TAG		1
 #define CONFIG_REVISION_TAG		1
 
-#define CONFIG_OF_LIBFDT		1
+#define CONFIG_OF_LIBFDT
+#define CONFIG_CMD_BOOTZ
 
 /*
  * NS16550 Configuration