Add Port wrappers for sc_port, sc_interface, and sc_export. Change-Id: Ib70cb7466461c8d32e3a260bf2a2d60a6ded87c3 Signed-off-by: Chun-Chen TK Hsu <chunchenhsu@google.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/19788 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>