dpdk: Add build related keywords for failsafe PMD

Added build related keywords for TAP, FAILSAFE PMD
and also added some missing keywords for mlx4 PMD

This is part of initial effort to enable vpp running over
dpdk on failsafe PMD in Microsoft Azure (1/4).

Change-Id: I2aebf209fbc6db030185f41971b51a593a003a3a
Signed-off-by: Rui Cai <rucai@microsoft.com>
diff --git a/build-data/packages/vpp.mk b/build-data/packages/vpp.mk
index 4122591..19e32ef 100644
--- a/build-data/packages/vpp.mk
+++ b/build-data/packages/vpp.mk
@@ -39,6 +39,9 @@
 ifeq ($($(PLATFORM)_uses_dpdk_mlx5_pmd),yes)
 vpp_configure_args += --with-dpdk-mlx5-pmd
 endif
+ifeq ($($(PLATFORM)_uses_dpdk_mlx4_pmd),yes)
+vpp_configure_args += --with-dpdk-mlx4-pmd
+endif
 else
 vpp_configure_args += --disable-dpdk-plugin
 endif