ARM: dts: lan966x: Disable can0 on pcb8291

On pcb8291, can0 and the network driver share some of the GPIOs so only
1 device can be active. Therefore disable can0 as we want to enable the
network driver.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220719201158.1696168-3-horatiu.vultur@microchip.com