src: update make install for DPDK

src: update make install for DPDK

Update make install for DPDK to install to the appropriate DESTDIR.

Change-Id: I6e4f0707038c05eeb2e2849ce34300149d8c5410
Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Ian Stokes <ian.stokes@intel.com>
Reviewed-by: Antonio Fischetti<antonio.fischetti@intel.com>
Reviewed-by: Radek Zetik <radekx.zetik@intel.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>
Reviewed-by: Al Morton <acmorton@att.com