Mov apps/examples/composite to apps/system/composite; convert configs/stm3210e-eval/composite to use kconfig-frontend tools -- untested

SAMA5 OHCI:  Fix some problems with D-Cache coherency and physical addressing related to interrupt endpoints

SAMA5 OHCI:  When UPLL drives OHCI the logically correct divider of 10 does not work;  But a divider of 5 does.  Why?

A consequence of previous change:  Configurations that select a PHY also need to set CONFIG_NETDEVICES or PHY configuration will be lost on the next reconfiguration

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