dt-bindings: usb: j721e: add ranges and dma-coherent props

Add missed 'ranges' and 'dma-coherent' properties as cdns-usb DT nodes has
child node and DMA IO is coherent on TI K3 J721E/J7200 SoCs.

This also fixes dtbs_check warning:
 cdns-usb@4104000: 'dma-coherent', 'ranges' do not match any of the regexes: '^usb@', 'pinctrl-[0-9]+'
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Aswath Govindraju <a-govindraju@ti.com>
Link: https://lore.kernel.org/r/20210115193124.5706-1-grygorii.strashko@ti.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml

@@ -17,6 +17,8 @@ properties:
   reg:
     description: module registers
 
+  ranges: true
+
   power-domains:
     description:
       PM domain provider node and an args specifier containing
@@ -58,6 +60,8 @@ properties:
   '#size-cells':
     const: 2
 
+  dma-coherent: true
+
 patternProperties:
   "^usb@":
     type: object