dt-bindings: pwm: imx: add i.MX8QXP compatible

i.MX8QXP compatible is missing in the list, add it.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

Documentation/devicetree/bindings/pwm/imx-pwm.yaml

@@ -43,6 +43,7 @@ properties:
               - fsl,imx8mn-pwm
               - fsl,imx8mp-pwm
               - fsl,imx8mq-pwm
+              - fsl,imx8qxp-pwm
           - const: fsl,imx27-pwm
 
   reg:
@@ -61,6 +62,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg