Add the initial device tree for the R8A7791 SoC based Henninger board. SCIF0
serial port support is included, so that the serial console can work.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>