[PATCH v3 3/4] tools/misc: Add xenwatchdogd.c copyright notice

[leigh@xxxxxxxxxxxxx]

From: Leigh Brown <leigh@xxxxxxxxxxxxx>

Add copyright notice and description of the program.

Signed-off-by: Leigh Brown <leigh@xxxxxxxxxxxxx>
---
 tools/misc/xenwatchdogd.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/misc/xenwatchdogd.c b/tools/misc/xenwatchdogd.c
index a16d1efc13..2884ca6ca9 100644
--- a/tools/misc/xenwatchdogd.c
+++ b/tools/misc/xenwatchdogd.c
@@ -1,3 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * xenwatchdogd.c
+ *
+ * Watchdog based on Xen hypercall watchdog interface.
+ *
+ * Copyright 2010 Citrix Ltd
+ * Copyright 2024 Leigh Brown <leigh@xxxxxxxxxxxxx>
+ *
+ */
 
 #include <err.h>
 #include <limits.h>
-- 
2.39.2