[IOAT]: Fix a warning in ioatdma

drivers/dma/ioatdma.c: In function 'ioat_init_module':
drivers/dma/ioatdma.c:830: warning: control reaches end of non-void function
Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/dma/ioatdma.c

@@ -826,7 +826,7 @@ static int __init ioat_init_module(void)
 	/* if forced, worst case is that rmmod hangs */
 	__unsafe(THIS_MODULE);
 
-	pci_module_init(&ioat_pci_drv);
+	return pci_module_init(&ioat_pci_drv);
 }
 
 module_init(ioat_init_module);