kdump/ppc64: rebuild initramfs image after migration
    
    upstream: fedora
    resolves: bz2027568
    conflict: The upstream patch was submitted before
              "Add file supported-kdump-targets.txt to kexec-tools"
              was added to rhel9. So there are SourceXX conflict
              in spec file. And similar code merge with patch
              "add keyutils as a weak dependency for POWER"
    
    commit 71b7a2f47c783b33965e8fc469dc44bda08cf458
    Author: Hari Bathini <hbathini@linux.ibm.com>
    Date:   Mon Jul 12 15:33:03 2021 +0530
    
        kdump/ppc64: rebuild initramfs image after migration
    
        Dump capture initramfs needs rebuild after partition migration (LPM).
        Use servicelog notification mechanism to invoke kdump rebuild after
        migration.
    
        Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
        Reviewed-by: Pingfan Liu <piliu@redhat.com>
        Acked-by: Kairui Song <kasong@redhat.com>
    
    Signed-off-by: Tao Liu <ltao@redhat.com>