dt-bindings: pse: tps23881: add reset-gpios

The TPS23881 has an active-low reset pin that can be connected to an
SoC.  Document this with the device-tree binding.

Signed-off-by: Kyle Swenson <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Oleksij Rempel <[email protected]>
Reviewed-by: Kory Maincent <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kyle-swenson-est

Documentation/devicetree/bindings/net/pse-pd/ti,tps23881.yaml

@@ -23,6 +23,9 @@ properties:
   '#pse-cells':
     const: 1
 
+  reset-gpios:
+    maxItems: 1
+
   channels:
     description: each set of 8 ports can be assigned to one physical
       channels or two for PoE4. This parameter describes the configuration