omap3_beagle: 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: Tom Rini <trini@ti.com>

include/configs/omap3_beagle.h

@@ -53,7 +53,8 @@
 
 #define CONFIG_MISC_INIT_R
 
-#define CONFIG_OF_LIBFDT		1
+#define CONFIG_OF_LIBFDT
+#define CONFIG_CMD_BOOTZ
 
 #define CONFIG_CMDLINE_TAG		1	/* enable passing of ATAGs */
 #define CONFIG_SETUP_MEMORY_TAGS	1