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>

Documentation/devicetree/bindings/mfd/rohm,bd96801-pmic.yaml

@@ -57,8 +57,7 @@ properties:
       - prstb
       - intb-only
 
-  timeout-sec:
-    maxItems: 2
+  timeout-sec: true
 
   regulators:
     $ref: /schemas/regulator/rohm,bd96801-regulator.yaml
@@ -72,7 +71,10 @@ required:
   - interrupt-names
   - regulators
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/watchdog/watchdog.yaml
+
+unevaluatedProperties: false
 
 examples:
   - |