tools/bootconfig: Fix to return 0 if succeeded to show the bootconfig

Fix bootconfig to return 0 if succeeded to show the bootconfig
in initrd. Without this fix, "bootconfig INITRD" command
returns !0 even if the command succeeded to show the bootconfig.

Link: http://lkml.kernel.org/r/159230246566.65555.11891772258543514487.stgit@devnote2

Cc: [e-mail]
Fixes: 950313ebf79c ("tools: bootconfig: Add bootconfig command")
Signed-off-by: Masami Hiramatsu <[e-mail]>
Signed-off-by: Steven Rostedt (VMware) <[e-mail]>

tools/bootconfig/main.c

···
 	}
 
 	ret = load_xbc_from_initrd(fd, &buf);
-	if (ret < 0)
+	if (ret < 0) {
 		pr_err("Failed to load a boot config from initrd: %d\n", ret);
-	else
-		xbc_show_compact_tree();
-
+		goto out;
+	}
+	xbc_show_compact_tree();
+	ret = 0;
+out:
 	close(fd);
 	free(buf);