arm64: dts: renesas: Add initial DTSI for RZ/V2M SoC

arm64: dts: renesas: Add initial DTSI for RZ/V2M SoC

Details of the SoC can be found here:
https://www.renesas.com/us/en/products/microcontrollers-microprocessors/rz-cortex-a-mpus/rzv2m-dual-cortex-a53-lpddr4x32bit-ai-accelerator-isp-4k-video-codec-4k-camera-input-fhd-display-output

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20220504094456.24386-3-phil.edworthy@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>