dt-bindings: imx: gpcv2: add support for optional resets

For some domains the resets of the devices in the domain are not
automatically triggered. Add an optional resets property to allow
the GPC driver to trigger those resets explicitly.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml

@@ -66,6 +66,13 @@ properties:
 
           power-supply: true
 
+          resets:
+            description: |
+              A number of phandles to resets that need to be asserted during
+              power-up sequencing of the domain.
+            minItems: 1
+            maxItems: 4
+
         required:
           - '#power-domain-cells'
           - reg