Defines starting with `p' in osfmk/ppc/POWERMAC/mp

• PCI1AdrReg osfmk/ppc/POWERMAC/mp/MPPlugIn.h:137
• _PPC_POWERMAC_MP_MP_H_ osfmk/ppc/POWERMAC/mp/mp.h:27
• PriCPU osfmk/ppc/POWERMAC/mp/MPPlugIn.h:144