dt-bindings: mfd: rohm,bd96801-pmic: Correct timeout-sec length and reference watchdo...

dt-bindings: mfd: rohm,bd96801-pmic: Correct timeout-sec length and reference watchdog schema

The parent node of ROHM BD96801 PMIC is also holding properties for the
watchdog, thus it should reference watchdog.yaml schema.  OTOH, the
timeout-sec property is used only as one number.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Matti Vaittinen <mazziesaccount@gmail.com>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>