spec: only install mkfadumprd for ppc
    
    Resolves: bz2139000
    Upstream: Fedora
    Conflict: None
    
    commit 748eb3a2a6b41bc74748f1f1845b91b77548e1d8
    Author: Kairui Song <kasong@tencent.com>
    Date:   Sun Jan 9 18:03:35 2022 +0800
    
        spec: only install mkfadumprd for ppc
    
        fadump is a ppc only feature, mkfadumprd is only needed for fadump, drop
        it for other arch.
    
        Reviewed-by: Philipp Rudo <prudo@redhat.com>
        Signed-off-by: Kairui Song <kasong@tencent.com>
    
    Signed-off-by: Lichen Liu <lichliu@redhat.com>