The MPFS RNG driver is not described by the device tree and is instead
registered dynamically by the system controller. Explicitly bind the
MPFS RNG driver as a child device during system controller probe.
This ensures the RNG device is instantiated and available via UCLASS_RNG
without requiring a device tree node.
Signed-off-by: Jamie Gibbons <jamie.gibbons@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>