vppinfra: fix debug image builds on arm
vppinfra: fix debug image builds on arm

vextq_u8(...) reuqires constant value so instead of
inline function we need to use macro.

Type: fix
Signed-off-by: Damjan Marion <5049904167cded6f794234f081646667c24affd3@me.com>
Change-Id: I9c1d878c9ec750f0ed5b5eac4dffde50e97e7357

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