dt-bindings: usb: renesas,usbhs: Document RZ/G2L family compatible

The USBHS IP found on RZ/G2L SoCs only has 10 pipe buffers compared
to 16 pipe buffers on RZ/A2M. Document renesas,rzg2l-usbhs family
compatible to handle this difference for RZ/G2L family SoCs.

Signed-off-by: Biju Das <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/usb/renesas,usbhs.yaml

···
       - items:
           - enum:
               - renesas,usbhs-r7s9210   # RZ/A2
+          - const: renesas,rza2-usbhs
+
+      - items:
+          - enum:
               - renesas,usbhs-r9a07g043 # RZ/G2UL and RZ/Five
               - renesas,usbhs-r9a07g044 # RZ/G2{L,LC}
               - renesas,usbhs-r9a07g054 # RZ/V2L
-          - const: renesas,rza2-usbhs
+          - const: renesas,rzg2l-usbhs
 
       - items:
           - enum: