dt-bindings: usb: qcom,dwc3: Introduce interconnect properties for Qualcomm DWC3 driver

Add documentation for the interconnects and interconnect-names
properties for USB.

Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

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

@@ -70,6 +70,14 @@ properties:
   resets:
     maxItems: 1
 
+  interconnects:
+    maxItems: 2
+
+  interconnect-names:
+    items:
+      - const: usb-ddr
+      - const: apps-usb
+
   interrupts:
     items:
       - description: The interrupt that is asserted