dt-bindings: usb: snps,dwc3: correct i.MX8MQ support

The previous i.MX8MQ support breaks rockchip,dwc3 support,
so use select to restrict i.MX8MQ support and avoid break others.

Fixes: 3754c41c7686 ("dt-bindings: usb: snps,dwc3: support i.MX8MQ")
Signed-off-by: Peng Fan <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/usb/fsl,imx8mq-dwc3.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/fsl,imx8mq-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP iMX8MQ Soc USB Controller
+
+maintainers:
+  - Li Jun <[e-mail]>
+  - Peng Fan <[e-mail]>
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - fsl,imx8mq-dwc3
+  required:
+    - compatible
+
+properties:
+  compatible:
+    items:
+      - const: fsl,imx8mq-dwc3
+      - const: snps,dwc3
+
+allOf:
+  - $ref: snps,dwc3.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mq-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    usb_dwc3_1: usb@38200000 {
+        compatible = "fsl,imx8mq-dwc3", "snps,dwc3";
+        reg = <0x38200000 0x10000>;
+        clocks = <&clk IMX8MQ_CLK_USB2_CTRL_ROOT>,
+                 <&clk IMX8MQ_CLK_USB_CORE_REF>,
+                 <&clk IMX8MQ_CLK_32K>;
+        clock-names = "bus_early", "ref", "suspend";
+        interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
+        phys = <&usb3_phy1>, <&usb3_phy1>;
+        phy-names = "usb2-phy", "usb3-phy";
+    };

Documentation/devicetree/bindings/usb/snps,dwc3.yaml

···
 
 properties:
   compatible:
-    oneOf:
-      - items:
-          - const: fsl,imx8mq-dwc3
-          - const: snps,dwc3
-      - const: snps,dwc3
-      - const: synopsys,dwc3
-        deprecated: true
+    contains:
+      oneOf:
+        - const: snps,dwc3
+        - const: synopsys,dwc3
+          deprecated: true
 
   reg:
     maxItems: 1