makefile: Remove obsolete copy operations

makefile: Remove obsolete copy operations

In the past DPDK, OVS and QEMU were copied and compiled for all
three OVS configurations, i.e. Vanilla OVS, OVS+DPDK with vHost Cuse
and OVS+DPK with vHost User. Later compilation of QEMU was triggered
just once and DPDK compilation was removed from OVS Vanilla dir.
However source code was still copied to all directories. Unnecessary
copy operations were removed.

Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>