cmake HAVE_DPDK examples

ceph/ceph src/test/msgr/CMakeLists.txt :50 

endif(HAVE_DPDK)

fastio/1store CMakeLists.txt :127 

target_compile_options(scylla PUBLIC
        -std=gnu++1z
        -DHAVE_DPDK
        -DHAVE_HWLOC
        "${SEASTAR_CFLAGS}")