ARM: dts: lan966x: Add mcan1 node.

Add the mcan1 node. By default, keep it disabled.

Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220627110552.26315-1-kavyasree.kotagiri@microchip.com