partial update of the new kokkos docs

or GPUs (NVIDIA Cuda).

For a CMake or make build, these are the possible choices for the

``KOKKOS_ARCH`` settings described below.  Note that for CMake, these are

really Kokkos variables, not LAMMPS variables.  Hence you must use

case-sensitive values, e.g. BDW, not bdw.

``Kokkos_ARCH_<arch>`` settings described below.  Note that for CMake,

these are really Kokkos variables, not LAMMPS variables.  Hence you

must use case-sensitive variable names, i.e. ``Kokkos_ARCH_BDW``

and **NOT** ``KOKKOS_ARCH_BDW`` or ``Kokkos_arch_bdw`` and so on.

* AMDAVX = AMD 64-bit x86 CPUs

* EPYC   = AMD EPYC Zen class CPUs

.. code-block:: bash

   -D KOKKOS_ARCH=archCPU         # archCPU = CPU from list above

   -D KOKKOS_ENABLE_OPENMP=yes

   -D Kokkos_ARCH_<cpuarch>=yes  # <cpuarch> = CPU from list above

   -D Kokkos_ENABLE_OPENMP=yes

For Intel KNLs using OpenMP, set these 2 variables:

.. code-block:: bash

   -D KOKKOS_ARCH=KNL

   -D KOKKOS_ENABLE_OPENMP=yes

   -D Kokkos_ARCH_KNL=yes

   -D Kokkos_ENABLE_OPENMP=yes

For NVIDIA GPUs using CUDA, set these 4 variables:

.. code-block:: bash

   -D KOKKOS_ARCH="archCPU;archGPU"   # archCPU = CPU from list above that is hosting the GPU

                                      # archGPU = GPU from list above

   -D KOKKOS_ENABLE_CUDA=yes

   -D KOKKOS_ENABLE_OPENMP=yes

   -D Kokkos_ARCH_<cpuarch>=yes  # <cpuarch> = CPU from list above that is hosting the GPU

   -D Kokkos_ARCH_<gpuarch>=yes  # <gpuarch> = GPU from list above

   -D Kokkos_ENABLE_CUDA=yes

   -D Kokkos_ENABLE_OPENMP=yes

   -D CMAKE_CXX_COMPILER=wrapper # wrapper = full path to Cuda nvcc wrapper

The wrapper value is the Cuda nvcc compiler wrapper provided in the