dt-bindings: usb: vialab,vl817: Cleanup compatible, reset-gpios and required

Cleanup by removing unneeded quotes from refs and
add maxItems to reset-gpios and fix the required list.

Fixes: 31360c28df ("dt-bindings: usb: Add binding for Via lab VL817 hub controller")
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230130084744.2539-5-linux.amoon@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/vialab,vl817.yaml

@@ -14,29 +14,32 @@ allOf:
 
 properties:
   compatible:
-    items:
-      - enum:
-          - usb2109,2817
-          - usb2109,817
+    enum:
+      - usb2109,2817
+      - usb2109,817
 
   reg: true
 
   reset-gpios:
-    description: GPIO controlling the RESET# pin.
+    maxItems: 1
+    description:
+      GPIO controlling the RESET# pin.
 
   vdd-supply:
     description:
       phandle to the regulator that provides power to the hub.
 
   peer-hub:
-    $ref: '/schemas/types.yaml#/definitions/phandle'
+    $ref: /schemas/types.yaml#/definitions/phandle
     description:
       phandle to the peer hub on the controller.
 
 required:
-  - peer-hub
   - compatible
   - reg
+  - reset-gpios
+  - vdd-supply
+  - peer-hub
 
 additionalProperties: false
 
@@ -45,7 +48,6 @@ examples:
     #include <dt-bindings/gpio/gpio.h>
 
     usb {
-        dr_mode = "host";
         #address-cells = <1>;
         #size-cells = <0>;