u-boot-imx6dongle: Add u-boot fork of i.MX6 HDMI dongle

Signed-off-by: Matthias Benesch <twoof7@freenet.de>
linux-imx6dongle: Add Linux Kernel fork of i.MX6 HDMI dongle

Signed-off-by: Matthias Benesch <twoof7@freenet.de>
gk802: Add Zealz GK802 machine configuration

Signed-off-by: Matthias Benesch <twoof7@freenet.de>