Add a new method to the USB host driver interface:  getdevinfo.  This method will return information about the currently connected device.  At present, it only returns the device speed.  The speed is needed by the enumeration logic in order to set a credible initial EP0 max packet size

Add ENCX24J600 Ethernet driver and support for the ENCX24J600 with the Olimex STM32 P107 board.  From Max Holtberg

SAMA5 OHCI:  Fix semaphore handling bug.  OHCI is now function by itself again after changes to integrate with EHCI

SAMA5: EHCI now handles low- and full-speed connections by giving them to OHCI; OHCI now uses the work queue to defer interrupt processing; If both OHCI and EHCI are enabled, EHCI is the master of the UHPHS interrupt

SAMA5:  Major restructuring of the the OHCI driver drivers to better handle the multiple root hub ports and concureent transfers on each port.

Separate wait() and enumerate() methods from struct usbhost_driver_s and move to new interface, struct usbhost_connection_s.  This is part of the necessary restructuring of the USB host interface to support multiple root hub ports.

Add untested OHCI driver for the SAMA5; structure naming and header files for USB host initialization prototypes

Serial FIONREAD, FIONWRITE, and TERMIOS I/O processing from Mike Smith, Andrew Tridgell, and and Lorenz Meier

MMC/SD SDIO:  Correct return values when multiple block transfers are suppressed.  From Andrew Tridgell via Lorenz Meier