[ros-diffs] [mjmartin] 44993: [usb/usbehci] - Initial implementation of usbehci, aka USB 2.0. - Implement AddDevice, StartDevice, InterruptService and DPC Routines. - Implement basic IRP queuing and handling. - Implement starting, stopping of EHCI controller and querying port capabilities. - Implement PNP for Query Relations, Query ID, Query BusInfo. - Implement finding the active ports when USB devices are attached and releasing control to companion controller if devices is not a high speed devices. - Impl