dt-bindings: usb: samsung,exynos-dwc3: Add Exynos850 support

Exynos850 has dwc3 compatible USB controller, so it can reuse existing
dwc3 glue layer. Document a new compatible for Exynos850 and its clocks.
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20230819031731.22618-2-semen.protsenko@linaro.orgReviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml

@@ -15,6 +15,7 @@ properties:
       - samsung,exynos5250-dwusb3
       - samsung,exynos5433-dwusb3
       - samsung,exynos7-dwusb3
+      - samsung,exynos850-dwusb3
 
   '#address-cells':
     const: 1
@@ -101,6 +102,21 @@ allOf:
             - const: usbdrd30_susp_clk
             - const: usbdrd30_axius_clk
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos850-dwusb3
+    then:
+      properties:
+        clocks:
+          minItems: 2
+          maxItems: 2
+        clock-names:
+          items:
+            - const: bus_early
+            - const: ref
+
 additionalProperties: false
 
 examples: