arm64: dts: ti: k3-am62-wakeup: Add wakeup R5F node

arm64: dts: ti: k3-am62-wakeup: Add wakeup R5F node

AM62 SoC devices have a single core R5F processor in wakeup domain.
The R5F processor in wakeup domain is used as a device manager
for the SoC.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Judith Mendez <jm@ti.com>
Tested-by: Daniel Schultz <d.schultz@phytec.de>
Acked-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20250502220325.3230653-3-jm@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>