tools: imagetool: Extend print_header() by params argument

This allows image type print_header() callback to access struct
image_tool_params *params.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/pblimage.c b/tools/pblimage.c
index bd639c2..6c4d360 100644
--- a/tools/pblimage.c
+++ b/tools/pblimage.c
@@ -254,7 +254,7 @@
 	return 0;
 }
 
-static void pblimage_print_header(const void *ptr)
+static void pblimage_print_header(const void *ptr, struct image_tool_params *params)
 {
 	printf("Image Type:   Freescale PBL Boot Image\n");
 }