Add the pic_ipi method. While here, eliminate the unused openpic_ocpbus_softc struct.
Add the pic_ipi method. While here, eliminate the unused openpic_ocpbus_softc
struct.

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