[pymtl] fixed bug in PortBundle reverse
[pymtl] fixed bug in PortBundle reverse

tj93/pymtl,Glyfina-Fernando/pymtl,Abhinav117/pymtl,Abhinav117/pymtl,12yujim/pymtl,jck/pymtl,cfelton/pymtl,cfelton/pymtl,Abhinav117/pymtl,cornell-brg/pymtl,cornell-brg/pymtl,tj93/pymtl,cornell-brg/pymtl,cfelton/pymtl,jjffryan/pymtl,jck/pymtl,jck/pymtl,Abhinav117/pymtl,jjffryan/pymtl,jjffryan/pymtl,12yujim/pymtl,12yujim/pymtl,Glyfina-Fernando/pymtl,Glyfina-Fernando/pymtl,tj93/pymtl