Rename examples/usbstorage to examples/usbmsc.  From CCTSAO
More renaming examples/usbstorage to examples/usbmsc
SAMA5 UDPHS: Major changes to DMA interrupt and request handling to better handle DMA
SAMA5 UDPHS:  Fix bad setup for sam_req_write call introduce in last commit
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.
apps/examples/pwm:  Clean up some configuration confusion
DHCPD: Fix calculation of lease address.  Bad logic causes repeated assignment of the same IP address.  SourceForge bug #21 from Paolo Messina.
Networking:  Fix race condition that can cause missing loss-of-connection events.  From Max Holtzberg
Partial implementation of driver-based UDP backlog still missing some logic.  From Max Holtzberg.
Update to previous change from Max Holtzberg
Missing file change for previous driver-based UDP backlog from Max Holtzberg
SAMA5D3x-EK:  Add a new 'demo' configuration
Networking:  Important bug fix.  The backlog buffer pointer was not being incrmented so that only the first backlog buffer was getting added to the freelist.  From Max Holtzberg
SAMA5D3x-EK:  Add support for USB MSC device on AT25 serial flash
Back-port some bugfixes from the ENCX24J600 to the ENC28J60 driver (unverified).  From Max Holtzberg
Suppress attempts to manage USB trace if the USB MSC example is built as an NSH built-in application.  In that case, USB MSC does not do a good job managing trace data and gets in the way of other things that can do a better job (like NSH or the USB monitor).
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
Fix bug introduced to msconn; Was hanging is invoked from NSH
Fix warnings in USB MSC when compiled for a high speed device; also fix USB MSC default VID/PID configuration
SAMA5:  Add support EHCI/OHCI to sama5d3x-ek/demo (does not work yet); Fix some EHCI/OHCI compilation issues when DEBUG is disabled