mkimage: Drop blank line before main()

This is not needed. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

tools/mkimage.c

@@ -285,7 +285,6 @@ static void process_args(int argc, char **argv)
 		usage("Missing output filename");
 }
 
-
 int main(int argc, char **argv)
 {
 	int ifd = -1;