watchdog: ts4800_wdt: Fix refcount leak in ts4800_wdt_probe

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add  missing of_node_put() in some error paths.

Fixes: bf900639 ("watchdog: ts4800: add driver for TS-4800 watchdog")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220511114203.47420-1-linmq006@gmail.com


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