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/rkcommon.c b/tools/rkcommon.c
index 96efc11..12c27b3 100644
--- a/tools/rkcommon.c
+++ b/tools/rkcommon.c
@@ -481,7 +481,7 @@
 	return -ENOENT;
 }
 
-void rkcommon_print_header(const void *buf)
+void rkcommon_print_header(const void *buf, struct image_tool_params *params)
 {
 	struct header0_info header0;
 	struct header0_info_v2 header0_v2;