dracut-module-setup.sh: fix a loop over ls issue
    
    upstream: fedora
    resolves: bz2003832
    conflict: none
    
    commit 3b2fa982bbe413e61ac53fa114782e1f08f8a939
    Author: Kairui Song <kasong@redhat.com>
    Date:   Wed Aug 4 16:16:44 2021 +0800
    
        dracut-module-setup.sh: fix a loop over ls issue
    
        Iterating over ls output is fragile:
        https://github.com/koalaman/shellcheck/wiki/SC2045
    
        Signed-off-by: Kairui Song <kasong@redhat.com>
        Acked-by: Philipp Rudo <prudo@redhat.com>
    
    Signed-off-by: Tao Liu <ltao@redhat.com>