It seems PCI_OUR_REG_[1-5] registers are not mapped on PCI configuration space on Yukon Ultra(88E8056) such that accesses to these registers were NOPs which in turn make msk(4) instable on this controller. Use indirect access method to access PCI_OUR_REG_[1-5] registers. This should fix a long standing instability bug which prevented msk(4) working on Yukon Ultra. Special thanks to koitsu who gave me remote access to his system.
It seems PCI_OUR_REG_[1-5] registers are not mapped on PCI
configuration space on Yukon Ultra(88E8056) such that accesses to
these registers were NOPs which in turn make msk(4) instable on
this controller. Use indirect access method to access
PCI_OUR_REG_[1-5] registers. This should fix a long standing
instability bug which prevented msk(4) working on Yukon Ultra.
Special thanks to koitsu who gave me remote access to his system.

PR:	kern/114631, kern/116853
MFC after:	1 week

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