watchdog: ziirave_wdt: change name to be more specific

The RAVE watchdog is not a full system watchdog, but is used to reset
ethernet switch when required. Change the name to better reflect this
usage.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200313101138.25915-1-l.stach@pengutronix.de


Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>