ipc: use device_initcall

... since __initcall is now deprecated.

Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc ipc/ipc_sysctl.c
Simple merge

diff --cc ipc/mqueue.c
Simple merge

diff --cc ipc/util.c
Simple merge