dpdk: Update version to 21.02

Update of DPDK to latest stable release.
As this introduces new build dependency, it also adds install
of pyelftools to the build step. (note however that flush of pip downloads
cache dir is required)
https://doc.dpdk.org/guides-21.02/rel_notes/release_21_02.html

Type: improvement
Signed-off-by: Kepka, Krzysztof <krzysztof.kepka@intel.com>
Change-Id: I7ed2ca965f01c1062f5abc25ea428e8c1a016366

build/external/packages/dpdk.mk

@@ -22,10 +22,10 @@ DPDK_FAILSAFE_PMD            ?= n
 DPDK_MACHINE                 ?= default
 DPDK_MLX_IBV_LINK            ?= static
 
-dpdk_version                 ?= 20.11
+dpdk_version                 ?= 21.02
 dpdk_base_url                ?= http://fast.dpdk.org/rel
 dpdk_tarball                 := dpdk-$(dpdk_version).tar.xz
-dpdk_tarball_md5sum_20.11    := 13a990dc3b300635f685e268b36918a3
+dpdk_tarball_md5sum_21.02    := 2c3e4800b04495ad7fa8656a7e1a3ec1
 dpdk_tarball_md5sum          := $(dpdk_tarball_md5sum_$(dpdk_version))
 dpdk_url                     := $(dpdk_base_url)/$(dpdk_tarball)
 dpdk_tarball_strip_dirs      := 1
@@ -168,8 +168,8 @@ define dpdk_config_cmds
 	mkdir -p ../dpdk-meson-venv && \
 	python3 -m venv ../dpdk-meson-venv && \
 	source ../dpdk-meson-venv/bin/activate && \
-	(if ! ls $(PIP_DOWNLOAD_DIR)meson* ; then pip3 download -d $(PIP_DOWNLOAD_DIR) -f $(DL_CACHE_DIR) meson==0.54 setuptools wheel; fi) && \
-	pip3 install --no-index --find-links=$(PIP_DOWNLOAD_DIR) meson==0.54 && \
+	(if ! ls $(PIP_DOWNLOAD_DIR)meson* ; then pip3 download -d $(PIP_DOWNLOAD_DIR) -f $(DL_CACHE_DIR) meson==0.54 setuptools wheel pyelftools; fi) && \
+	pip3 install --no-index --find-links=$(PIP_DOWNLOAD_DIR) meson==0.54 pyelftools && \
 	PKG_CONFIG_PATH=$(dpdk_install_dir)/lib/pkgconfig meson setup $(dpdk_src_dir) \
 		$(dpdk_build_dir) \
 		$(DPDK_MESON_ARGS) \