According to the env.mk, DPDK include file can be
passed by user, so we need to use DPDK_INC to
avoid the compilation issue.
Change-Id: I0b60dc67a001d7d7a25d0c752c46a79b37e7bee5
Signed-off-by: Ziye Yang <optimistyzy@gmail.com>
Reviewed-on: https://review.gerrithub.io/377965
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: John Kariuki <John.K.Kariuki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>