tegra: enable bootz command

bootz is just like bootm, except that it can boot a raw zImage, without
requiring it to be wrapped inside a uImage.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/include/configs/tegra2-common.h b/include/configs/tegra2-common.h
index f61fb5a..6807762 100644
--- a/include/configs/tegra2-common.h
+++ b/include/configs/tegra2-common.h
@@ -194,4 +194,5 @@
 #define CONFIG_TEGRA_GPIO
 #define CONFIG_CMD_GPIO
 #define CONFIG_CMD_ENTERRCM
+#define CONFIG_CMD_BOOTZ
 #endif /* __TEGRA2_COMMON_H */