The kernel wouldnt link when SYSVIPC was disabled.  x86-64 was already
defining a cond_syscall, instead of duplicating it in the ppc64 port move it
into the arch specific portion of kernel/sys_ni.c
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>