arm64: dts: renesas: hihope-common: Separate out Rev.2.0 specific into hihope-rev2.dtsi file

Separate out Rev.2.0 specific hardware changes into hihope-rev2.dtsi
file so that hihope-common.dtsi can be used by all the variants for
RZ/G2M[N] boards.

LED node names have been updated according to Rev.4.0 schematics.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Link: https://lore.kernel.org/r/1593004330-5039-4-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>