Update ofp.h: add ofp_ifnet.h
Update ofp.h: add ofp_ifnet.h

Signed-off-by: Bogdan Pricope <385103c4eae27e55111df6ab7856eefb0647e14e@enea.com>
Reviewed-by: José Pekkarinen <d7cb8761fb0e75b1a78c2fda4f1daed76cd46cfe@nokia.com>

OpenFastPath/ofp,OpenFastPath/ofp,TolikH/ofp,TolikH/ofp,OpenFastPath/ofp,TolikH/ofp,OpenFastPath/ofp