arm64: dts: ti: k3-j721e-common-proc-board: Add support for mcu and main mcan nodes

Add four MCAN nodes present on the common processor board and set a
maximum data rate of 5 Mbps. Disable all other nodes as they
are not brought out on the common processor board.

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/20211122134159.29936-5-a-govindraju@ti.com