nitrogen6x: use EDID for HDMI detection

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nitrogen6x: include Koush's SuperUser

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nitrogen6x: Add support for Fusion 7 display and touch (bootscript and idc file)

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>