iomodules/router: add automatic loop unrolling
iomodules/router: add automatic loop unrolling

This commit uses a workaround to force the compiler to unroll the loops,
however this commit is only a temporal solution and should be improved in the
future.

iovisor/iovisor-ovn,netgroup-polito/iovisor-ovn,netgroup-polito/iovisor-ovn,iovisor/iovisor-ovn