Modification to work with isochronous transfers
Detail: cmodule.c, dwc_otg_riscos.c, dwc_otg_riscos.h, softc_device.c - modified to allow isochronous xfers. modhead.cmhg - mark module as isochronous.
Admin: Tested on pi b+ and pi 4
Detail: cmodule.c, dwc_otg_riscos.c, dwc_otg_riscos.h, softc_device.c - modified to allow isochronous xfers. modhead.cmhg - mark module as isochronous.
Admin: Tested on pi b+ and pi 4