arm64: dts: ti: k3-am65-mcu: Add Support for MCAN

Add Support for two MCAN controllers present on the am65x SOC. Both support
classic CAN messages as well as CAN-FD.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Apurva Nandan <a-nandan@ti.com>
Link: https://lore.kernel.org/r/20211122134159.29936-2-a-govindraju@ti.com