[PATCH kexec-tools] x86: use old screen_info if needed

[Simon Horman]

On Sun, Jan 28, 2018 at 01:52:31PM +0800, Dave Young wrote:
> With modern drm/kms graphic driver kexec-tools does not setup screen_info
> correctly so one will only see screen output after those drm drivers
> reinitializing after rebooting. Copying the old screen info from original
> boot_params will help during my test, although it could not work for some
> potential cases, but it is not worse than before.  This has been used in
> the kernel kexec_file_load.
> 
> Signed-off-by: Dave Young <dyoung at redhat.com>

Thanks, applied.