kdump/ppc64: migration action registration clean up
    
    resolves: bz2027568
    upstream: fedora
    conflict: None-functional conflict in spec file.
    
    commit 146f66262222e96bca47b691ed243fa5097aa55c
    Author: Hari Bathini <hbathini@linux.ibm.com>
    Date:   Tue Jul 27 23:59:48 2021 +0530
    
        kdump/ppc64: migration action registration clean up
    
        While kdump migration action is registered for LPM event, ensure it is
        cleared as appropriate to avoid duplicate/stale notification entries.
    
        Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
        Acked-by: Kairui Song <kasong@redhat.com>
    
    Signed-off-by: Tao Liu <ltao@redhat.com>