watchdog: mediatek: mt8195: add wdt support

Support MT8195 watchdog device.

Signed-off-by: Christine Zhu <Christine.Zhu@mediatek.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20210726122901.12195-4-Christine.Zhu@mediatek.com


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