dt-bindings: usb: Add Cypress cypd4226 Type-C controller

Add the device-tree binding documentation for Cypress cypd4226 dual
Type-C controller.

Signed-off-by: Wayne Chang <waynec@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230131175748.256423-2-jonathanh@nvidia.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>