Configuration contains:
- building tpl, spl and u-boot (forked u-boot repository)
- booting from SD card and network via PXE
- working ethernet, usb and uart
- minimal rootfs with busybox
- ready to flash SD card image
Signed-off-by: Michał Łyszczek <michal.lyszczek@bofc.pl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>