PLASMA: added v20.9.20 (#19106)
PLASMA: added v20.9.20 (#19106)

Co-authored-by: Piotr Luszczek <4de17f88079f0356d73eb45565b82537e418f5dd@icl.utk.edu>
iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack