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 --git a/ipc/mqueue.c b/ipc/mqueue.c
index c3b3117..4fcf39a 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -1459,4 +1459,4 @@
 	return error;
 }
 
-__initcall(init_mqueue_fs);
+device_initcall(init_mqueue_fs);