Defines starting with `p' in bsd/ppc

• PC bsd/ppc/reg.h:38
• PDP_ENDIAN bsd/ppc/endian.h:79
• PGOFSET bsd/ppc/param.h:44
• PGSHIFT bsd/ppc/param.h:45
• _PPC_ENDIAN_H_ bsd/ppc/endian.h:64
• _PPC_PARAM_H_ bsd/ppc/param.h:33
• _PPC_SIGNAL_ bsd/ppc/signal.h:49
• PS_STRINGS bsd/ppc/exec.h:98