[U-Boot] [U-Boot, v3, 19/21] efi_loader: split out escape sequence based size query

[Alexander Graf]

> We need to do something different for vidconsole, since it cannot
> respond to the query on stdin.  Prep work for next patch.
> 
> Signed-off-by: Rob Clark <robdclark at gmail.com>

Thanks, applied to efi-next

Alex