PROFINET: PDPortDataReal_block dissection is changed.

PROFINET: PDPortDataReal_block dissection is changed.

According to specification, PortState is renamed and dissected
as "LinkState.Link" and "LinkState.Port" which are both 8 bits.

Change-Id: I1eff258f48d6fd76286ae08a7d2d80793ea23f12
Reviewed-on: https://code.wireshark.org/review/30913
Reviewed-by: Gerald Combs <gerald@wireshark.org>
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>