Fix a bug introduced in previous commit.  Due to the interaction of the direct physical mappings with virtual page colour, we need to flush the data cache when a page changes colour.  I missed one case which broke pipes.
Fix a bug introduced in previous commit.  Due to the interaction of the
direct physical mappings with virtual page colour, we need to flush the
data cache when a page changes colour.  I missed one case which broke
pipes.

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