include/linux/Kbuild - linux-imx - Git at Google

 header-y += dvb/
 header-y += hdlc/
 header-y += hsi/
 header-y += raid/
 header-y += usb/
	header-y += dvb/
	header-y += hdlc/
	header-y += hsi/
	header-y += raid/
	header-y += usb/