multipathd: fix the comparison
    
    From shellcheck:
    /usr/lib/dracut/modules.d/90multipath/multipathd.sh:3:32: warning[SC2039]: In POSIX sh, == in place of = is undefined.
    /usr/lib/dracut/modules.d/90multipath/multipathd.sh:3:32: warning[SC2193]: The arguments to this comparison can never be equal.
    
    (cherry picked from commit 7c2521091f30d7c14caaf96850208afa2fe1d811)
    
    Resolves: #1888779
    
    patch_name: 0101.patch
    present_in_specfile: true
    location_in_specfile: 101
    squash_commits: true