On AM62x there are no hardware interrupts routed to A53 GIC
interrupt controller for MCU MCAN IPs, so MCU MCAN nodes were
omitted from MCU dtsi.

Timer polling was introduced in commits [1][2] so now add MCU MCAN nodes
to the MCU dtsi for the Cortex A53.

[1] commit b382380c ("can: m_can: Add hrtimer to generate software interrupt")
[2] commit bb410c03 ("dt-bindings: net: can: Remove interrupt properties for MCAN")

[fd: fixed labels to match datasheet numbering, revised commit message,
     fixed reg/reg-names order]
Signed-off-by: Judith Mendez <jm@ti.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20230802073635.11290-2-francesco@dolcini.itSigned-off-by: Nishanth Menon <nm@ti.com>