arm64: dts: r8a7795: Add support for R-Car H3 ES2.0

Update r8a7795.dtsi so it corresponds to R-Car H3 ES2.0 or later:
  - The following devices no longer exist on ES2.0, and are thus removed:
    fcpf2, fcpvd3, fcpvi2, fdp1-2, usb3-if1, vspd3, vspi2.
  - The DU <-> VSPD topology is different on ES2.0, hence remove the
    "compatible" and "vsps" properties from the DU node until the driver
    can handle this.

Move support for the ES1.x revision of the R-Car H3 SoC into a
separate file.  To avoid duplication, r8a7795-es1.dtsi includes
r8a7795.dtsi, and adds device nodes and properties where needed.
Note that while currently r8a7795-es1.dtsi only adds device nodes,
removal of devices nodes and properties can be implemented using the
/delete-node/ and /delete-property/ keywords, as shown below:

	&soc {
		/delete-node/ <name>@<addr>;
	};

	&<label> {
		/delete-property/ <prop>;
	};

Switch r8a7795-salvator-x.dts and r8a7795-h3ulcb.dts from r8a7795.dtsi
to r8a7795-es1.dtsi to preserve compatibility.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>