ipmi/watchdog: use strscpy() to instead of strncpy()

Xu Panda <xu.panda@zte.com.cn>

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL terminated strings.
Signed-off-by: Xu Panda <xu.panda@zte.com.cn>
Signed-off-by: Yang Yang <yang.yang29@zte.com>
Message-Id: <202212051936400309332@zte.com.cn>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_watchdog.c

@@ -213,8 +213,7 @@ static int set_param_str(const char *val, const struct kernel_param *kp)
 	char       valcp[16];
 	char       *s;
 
-	strncpy(valcp, val, 15);
-	valcp[15] = '\0';
+	strscpy(valcp, val, 16);
 
 	s = strstrip(valcp);