arm64: dts: renesas: rzg2lc-smarc: Disable CAN-FD channel0

arm64: dts: renesas: rzg2lc-smarc: Disable CAN-FD channel0

On RZ/G2LC SMARC EVK, CAN-FD channel0 is not populated, and currently we
are deleting a wrong and nonexistent node.  Fixing the wrong node would
invoke a dtb warning message, as channel0 is a required property.
Disable CAN-FD channel0 instead of deleting the node.

Fixes: 46da632734a5 ("arm64: dts: renesas: rzg2lc-smarc: Enable CANFD channel 1")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250801121959.267424-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>