dt-bindings: pinctrl: mediatek: mt8188: allow gpio hogs

Add gpio hogs subnode rules to the MT8188 pinctrl binding.

Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>

Documentation/devicetree/bindings/pinctrl/mediatek,mt8188-pinctrl.yaml

@@ -67,6 +67,11 @@ properties:
 
 # PIN CONFIGURATION NODES
 patternProperties:
+  "-hog(-[0-9]+)?$":
+    type: object
+    required:
+      - gpio-hog
+
   '-pins$':
     type: object
     additionalProperties: false