arm64: dts: ti: k3-j722s-main: Add R5F and C7x remote processor nodes

arm64: dts: ti: k3-j722s-main: Add R5F and C7x remote processor nodes

The K3 J722S SoCs have one single-core Arm Cortex-R5F processor in each
of the WAKEUP, MCU and MAIN voltage domain, and two C71x DSP subsystems
in MAIN voltage domain. Add the DT nodes to support Inter-Processor
Communication.

Signed-off-by: Apurva Nandan <a-nandan@ti.com>
[ refactoring changes to k3-j722s-main.dtsi ]
Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240830161742.925145-2-b-padhi@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>