mkimage: Add Kirkwood Boot Image support (kwbimage)

This patch adds support for "kwbimage" (Kirkwood Boot Image)
image types to the mkimage code.

For details refer to docs/README.kwbimage

This patch is tested with Sheevaplug board

Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
Acked-by: Ron Lee <ron@debian.org>

Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
diff --git a/tools/mkimage.c b/tools/mkimage.c
index c43b207..ab6ea32 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -148,6 +148,8 @@
 	int retval = 0;
 	struct image_type_params *tparams = NULL;
 
+	/* Init Kirkwood Boot image generation/list support */
+	init_kwb_image_type ();
 	/* Init FIT image generation/list support */
 	init_fit_image_type ();
 	/* Init Default image generation/list support */