dpdk: Update to use DPDK v20.11.

dpdk: Update to use DPDK v20.11.

This commit adds support for DPDK v20.11, it includes the following
changes.

1. travis: Remove explicit DPDK kmods configuration.
2. sparse: Fix build with 20.05 DPDK tracepoints.
3. netdev-dpdk: Remove experimental API flag.

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=173216&state=*

4. sparse: Update to DPDK 20.05 trace point header.

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=179604&state=*

5. sparse: Fix build with DPDK 20.08.

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=200181&state=*

6. build: Add support for DPDK meson build.

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=199138&state=*

7. netdev-dpdk: Remove usage of RTE_ETH_DEV_CLOSE_REMOVE flag.

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=207850&state=*

8. netdev-dpdk: Fix build with 20.11-rc1.

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=209006&state=*

9. sparse: Fix __ATOMIC_* redefinition errors

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=209452&state=*

10. build: Remove DPDK make build references.

   http://patchwork.ozlabs.org/project/openvswitch/list/?series=216682&state=*

For credit all authors of the original commits to 'dpdk-latest' with the
above changes have been added as co-authors for this commit.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Co-authored-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Sunil Pai G <sunil.pai.g@intel.com>
Co-authored-by: Sunil Pai G <sunil.pai.g@intel.com>
Signed-off-by: Eli Britstein <elibr@nvidia.com>
Co-authored-by: Eli Britstein <elibr@nvidia.com>
Tested-by: Harry van Haaren <harry.van.haaren@intel.com>
Tested-by: Govindharajan, Hariprasad <hariprasad.govindharajan@intel.com>
Tested-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>