arm64: dts: renesas: initial V3HSK board device tree
Add the initial device tree for the V3H Starter Kit board.
The board has 1 debug serial port (SCIF0); include support for it,
so that the serial console can work.
Based on the original (and large) patch by Vladimir Barinov.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>