[U-Boot] [U-Boot, 4/5] arm: Provide common PSCI based reset handler

[Alexander Graf]

> Most armv8 systems have PSCI support enabled in EL3, either through
> ARM Trusted Firmware or other firmware.
> 
> On these systems, we do not need to implement system reset manually,
> but can instead rely on higher level firmware to deal with it.
> 
> The exclude list seems excessive right now, but NXP is working on
> providing an in-tree PSCI implementation, so that all NXP systems
> can eventually use PSCI as well.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Thanks, applied to