vppinfra: add *_zero() vector inlines
vppinfra: add *_zero() vector inlines

Type: improvement
Change-Id: Ia63d1d7de273967ab7725d83634c0b6dd481c6c0
Signed-off-by: Damjan Marion <9141bba8b2efed526e55cf796d48631af330ad98@cisco.com>

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