session: call session_dequeue_notify after svm_fifo_dequeue_drop
session: call session_dequeue_notify after svm_fifo_dequeue_drop

Type: fix

dequeue_notify callback at app-layer needs to know available space in fifo,
so, session_dequeue_notify should be called after svm_fifo_dequeue_drop

Change-Id: I136675d29ec32bea9b33a05deb6710f72ce8d5b1
Signed-off-by: Vladimir Kropylev <f8129a796e934f0518e32e432cbbfd4f723f9f09@enea.com>

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