libopenflow: Convenience methods on ofp_phy_port
libopenflow: Convenience methods on ofp_phy_port

This adds some helpers for turning on and off bits in ofp_phy_ports
so that we need less bit-flipping logic scattered elsewhere.

pthien92/sdn,kavitshah8/SDNDeveloper,kpengboy/pox-exercise,adusia/pox,kulawczukmarcin/mypox,kulawczukmarcin/mypox,noxrepo/pox,denovogroup/pox,jacobq/csci5221-viro-project,PrincetonUniversity/pox,andiwundsam/_of_normalize,chenyuntc/pox,carlye566/IoT-POX,kulawczukmarcin/mypox,diogommartins/pox,xAKLx/pox,andiwundsam/_of_normalize,chenyuntc/pox,xAKLx/pox,adusia/pox,kulawczukmarcin/mypox,denovogroup/pox,PrincetonUniversity/pox,pthien92/sdn,adusia/pox,waltznetworks/pox,chenyuntc/pox,carlye566/IoT-POX,jacobq/csci5221-viro-project,MurphyMc/pox,jacobq/csci5221-viro-project,denovogroup/pox,jacobq/csci5221-viro-project,kpengboy/pox-exercise,carlye566/IoT-POX,MurphyMc/pox,noxrepo/pox,MurphyMc/pox,VamsikrishnaNallabothu/pox,noxrepo/pox,kpengboy/pox-exercise,waltznetworks/pox,VamsikrishnaNallabothu/pox,adusia/pox,MurphyMc/pox,denovogroup/pox,pthien92/sdn,PrincetonUniversity/pox,kpengboy/pox-exercise,pthien92/sdn,kulawczukmarcin/mypox,noxrepo/pox,VamsikrishnaNallabothu/pox,waltznetworks/pox,chenyuntc/pox,carlye566/IoT-POX,diogommartins/pox,diogommartins/pox,andiwundsam/_of_normalize,jacobq/csci5221-viro-project,pthien92/sdn,PrincetonUniversity/pox,waltznetworks/pox,andiwundsam/_of_normalize,VamsikrishnaNallabothu/pox,MurphyMc/pox,xAKLx/pox,adusia/pox,kavitshah8/SDNDeveloper,kavitshah8/SDNDeveloper,VamsikrishnaNallabothu/pox,carlye566/IoT-POX,kpengboy/pox-exercise,PrincetonUniversity/pox,xAKLx/pox,chenyuntc/pox,diogommartins/pox,waltznetworks/pox,xAKLx/pox,denovogroup/pox,kavitshah8/SDNDeveloper,diogommartins/pox