Fix AES-GCM on Power 8 CPUs
    
    Our backported patch unconditionally uses assembly instructions for
    Power9 and later, which triggers SIGILL on Power8 machines:
    
    | [ 3705.137658] sshd[1703]: illegal instruction (4) at 7fff85526aac nip 7fff85526aac lr 7fff854828e0 code 1 in libcrypto.so.3.0.5[7fff85240000+300000]
    
    Backport upstream's fix for this.
    
    Resolves: rhbz#2124845
    Signed-off-by: Clemens Lang <cllang@redhat.com>