arm64: dts: renesas: r8a779h0: Add ISP core function block

arm64: dts: renesas: r8a779h0: Add ISP core function block

The first ISP instance on V4M has both a channel select and core
function block, describe the core region in addition to the existing cs
region. While at it update the second ISP to match the new bindings and
add the reg-names and interrupt-names property.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250423163113.2961049-5-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>