[U-Boot] [U-Boot,2/4] efi_loader: Add an EFI_CALL() macro

[Alexander Graf]

> Rather than open-coding EFI_EXIT() + callback + EFI_ENTRY(), introduce
> an EFI_CALL() macro.  This makes callbacks into UEFI world (of which
> there will be more in the future) more concise and easier to locate in
> the code.
> 
> Signed-off-by: Rob Clark <robdclark at gmail.com>

Thanks, applied to efi-next

Alex