MFC r271159, r271168 and r271680:
Add USB LED driver for the Dream Cheeky WebMail Notifier.
MFC r269569:
Remove unused defines.
Fix some device_printf's that were missing '\n' at the end or had
spelling errors.

PR:		145319
MFC r264923:
Remove device type from the uftdi_devs table, enhance the jtag-skip feature.