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/imagetool.h b/tools/imagetool.h
index fdceea4..a766aa2 100644
--- a/tools/imagetool.h
+++ b/tools/imagetool.h
@@ -132,7 +132,7 @@
 	 */
 	int (*verify_header) (unsigned char *, int, struct image_tool_params *);
 	/* Prints image information abstracting from image header */
-	void (*print_header) (const void *);
+	void (*print_header) (const void *, struct image_tool_params *);
 	/*
 	 * The header or image contents need to be set as per image type to
 	 * be generated using this callback function.