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

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).

DHCPD: Fix calculation of lease address.  Bad logic causes repeated assignment of the same IP address.  SourceForge bug #21 from Paolo Messina.

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

Add example configurations that enable USB trace options must have Kconfig options to select the trace output

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