PCI: Replace deprecated __initcall with device_initcall.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 963a976..95eb083 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -482,5 +482,5 @@
 	return 0;
 }
 
-__initcall(pci_proc_init);
+device_initcall(pci_proc_init);