dt-bindings: usb: samsung,exynos-dwc3 Add exynos990 compatible

Add a compatible for the exynos990-dwusb3 node. It's compatible with the
exynos850 variant when using the highspeed mode.

Signed-off-by: Igor Belwon <igor.belwon@mentallysanemainliners.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250217-exynos990-bindings-usb3-v2-1-3b3f0809f4fb@mentallysanemainliners.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -11,12 +11,16 @@ maintainers:
 
 properties:
   compatible:
-    enum:
-      - google,gs101-dwusb3
-      - samsung,exynos5250-dwusb3
-      - samsung,exynos5433-dwusb3
-      - samsung,exynos7-dwusb3
-      - samsung,exynos850-dwusb3
+    oneOf:
+      - enum:
+          - google,gs101-dwusb3
+          - samsung,exynos5250-dwusb3
+          - samsung,exynos5433-dwusb3
+          - samsung,exynos7-dwusb3
+          - samsung,exynos850-dwusb3
+      - items:
+          - const: samsung,exynos990-dwusb3
+          - const: samsung,exynos850-dwusb3
 
   '#address-cells':
     const: 1