x86/efi: Initialize and display UEFI secure boot state a bit later during init

x86/efi: Initialize and display UEFI secure boot state a bit later during init

Otherwise Xen dom0 does not display "Secure boot enabled" message if it runs
on secure boot enabled platform. This happens because boot_params.secure_boot
is initialized too late. However, despite lack of message all features depending
on UEFI secure boot are enabled properly.

Orabug: 27258204

Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>