SAMA5:  Add support EHCI/OHCI to sama5d3x-ek/demo (does not work yet); Fix some EHCI/OHCI compilation issues when DEBUG is disabled

Fix warnings in USB MSC when compiled for a high speed device; also fix USB MSC default VID/PID configuration

Extend USB trace logic.  When we are configured to decode and stringify trace data, de-stringification support is not included for class driver trace output

CDC/ACM and PL2303 device drivers:  Don't use the max packet size assigned to an endpoint in order to determine the request buffer size.  The endpoint has not yet been configured that max packet size may be wrong.

Initial cut of a driver for the TI CC3000 network module with support on the Freescale KL25Z board from Alan Carvalho de Assis

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

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 OHCI:  Re-organize some endpoint list data structures.. Strange things happen when semaphores lie in DMA memory which is occasionally invalidated

SAMA5:  Alternatie clock configuration that yields a perfect 48MHz full speed USB clock and a CPU clock of 384MHz

Clean up some LP17xx and STM32 USB host configuration compilation errors due to the massive changes to the USB host interfaces needed to support the SAMA5

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.