Enable DU and link with DSI on RZ/{G2L,G2LC,V2L} SMARC EVK.

Move DSI port properties from board dtsi to SoC dtsi and then link with DU
and after that enable DU on the board dtsi.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240222132117.137729-4-biju.das.jz@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>