session: fix io_evt mq locking
session: fix io_evt mq locking

Type: fix

Change-Id: Iaa8045bba19cc305c84074668a20e1468d431b10
Signed-off-by: Nathan Skrzypczak <0fa918c439baf617eab84c5ae2a48ee9db643966@gmail.com>

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