ARM: dts: renesas: koelsch: Update ADV7180 binding

ARM: dts: renesas: koelsch: Update ADV7180 binding

Use the more modern adi,adv7180cp compatible for the CVBS input found on
R-Car Gen2 Koelsch boards. This aligns the bindings with the other Gen2
board with the same setup Gose.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20251003215318.39757-1-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>