Revert "Revert "x86_64: enable the kexec file load by default""
    
    Resolves: bz1977559
    Upstream: Fedora
    Conflict: None
    
    commit 7ae9669f3961c9a95f3b04803bf61730b34f585a
    Author: Coiby Xu <coxu@redhat.com>
    Date:   Tue Jul 6 10:31:36 2021 +0800
    
        Revert "Revert "x86_64: enable the kexec file load by default""
    
        This reverts commit 073c30973cf45ce0cea7bfd2bb30c5449a041a54, i.e.
        re-enable the kexec file load by default since this dual signature
        issue no longer bothers Fedora 34.
    
        Signed-off-by: Coiby Xu <coxu@redhat.com>
        Acked-by: Kairui Song <kasong@redhat.com>
    
    Signed-off-by: Coiby Xu <coxu@redhat.com>