[U-Boot] [U-Boot,5/5] efi_loader: Add generic PSCI RTS

[Alexander Graf]

> Now that we have generic PSCI reset and shutdown support in place, we can
> advertise those as EFI Run Time Services, allowing efi applications and
> OSs to reset and shut down systems.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Thanks, applied to