watchdog: hpwdt: Module paramerter alias.

Add module parameter "timeout" as an alias to "soft_margin."
This aligns hpwdt usage more closely with other WDT while
retaining backwards compatibility.

Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 69a88b1..eb947bc 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -367,6 +367,9 @@ MODULE_VERSION(HPWDT_VERSION);
 module_param(soft_margin, int, 0);
 MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
 
+module_param_named(timeout, soft_margin, int, 0);
+MODULE_PARM_DESC(timeout, "Alias of soft_margin");
+
 module_param(nowayout, bool, 0);
 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
 		__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");