cnat: fix spinlock
cnat: fix spinlock

Type: fix

Change-Id: Id6406702061ada54e51ebcf5c367328605de2b6b
Signed-off-by: Nathan Skrzypczak <0fa918c439baf617eab84c5ae2a48ee9db643966@gmail.com>

chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp