memif: Revert "memif buffer leaks during disconnect."
memif: Revert "memif buffer leaks during disconnect."

This reverts commit d570c4d18df404cb59ef72d20d56f8e31418c8e9.
That commit introduced crash into memif make test-debug.
To reproduce: "TEST=memif make test-debug".

With this commit reverted the make test-debug for memif passes.

Type: fix
Change-Id: Ic335359e2050bb8a5d530b01c595b081476fa197
Signed-off-by: Andrew Yourtchenko <eb6233fe2fbd585844f4fb8426b53b186ab379b1@gmail.com>

FDio/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp