[U-Boot] [U-Boot, v4, 08/16] Define board_quiesce_devices() in a shared location

[Alexander Graf]

> This undocumented function relies on arch-specific code to declare a nop
> weak version. Add the weak function in common code instead to avoid having
> to duplicate the same function in each arch.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

Thanks, applied to efi-next

Alex