fix regression in powerpc[64] SO_PEERSEC definition

commit 587f5a53bc moved the definition
of SO_PEERSEC to bits/socket.h for archs where the SO_* macros differ
from their standard values, but failed to add copies of the generic
definition for powerpc and powerpc64.

arch/powerpc/bits/socket.h

@@ -36,6 +36,7 @@ struct cmsghdr {
 #define SO_PASSCRED     20
 #define SO_PEERCRED     21
 #define SO_ACCEPTCONN   30
+#define SO_PEERSEC      31
 #define SO_SNDBUFFORCE  32
 #define SO_RCVBUFFORCE  33
 #define SO_PROTOCOL     38

arch/powerpc64/bits/socket.h

@@ -54,6 +54,7 @@ struct cmsghdr {
 #define SO_PASSCRED     20
 #define SO_PEERCRED     21
 #define SO_ACCEPTCONN   30
+#define SO_PEERSEC      31
 #define SO_SNDBUFFORCE  32
 #define SO_RCVBUFFORCE  33
 #define SO_PROTOCOL     38