MFC r284622: Remove device queue freeze handling and replace it with dummy.
MFC r284622: Remove device queue freeze handling and replace it with dummy.

At this point CTL has no known use case for device queue freezes.
Same time existing (considered to be broken) code was found to cause
modify-after-free issues.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase