portable Directory Reference

Directories
	analog
	bridgetek
	chipidea
	dialog
	ehci
	espressif
	mentor
	microchip
	mindmotion
	nordic
	nuvoton
	nxp
	ohci
	raspberrypi
	renesas
	sony
	st
	sunxi
	synopsys
	template
	ti
	valentyusb
	wch