remoteproc: k3-r5: Add support for R5F core on AM62A SoCs

AM62A has a R5F core in MCU voltage domain.
Extend support for R5F remote proc driver on AM62A with compatible
strings.

Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Reviewed-by: Devarsh Thakkar <devarsht@ti.com>