staging: vt6655: Replace MACvIntEnable with VNSvOutPortD

Replace macro MACvIntEnable with VNSvOutPortD and as it
was only used twice, it can now be removed.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/182b9f8edd1ce3f6ff12a2942e990dae0f80099a.1653203927.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>