Make net_dev_init() an __initcall

If you were looking to find where net_dev_init() is called, you wouldn't
have guessed it's in drivers/block/genhd.c, would you?

Nothing should break if the __initcall net_dev_init is called too late
now, since register_netdevice() will call it for us in that case.

drivers/block/genhd.c

@@ -202,7 +202,6 @@ extern int blk_dev_init(void);
 #ifdef CONFIG_FUSION
 extern int fusion_init(void);
 #endif
-extern int net_dev_init(void);
 extern int soc_probe(void);
 extern int atmdev_init(void);
 extern int i2o_init(void);
@@ -226,9 +225,6 @@ int __init device_init(void)
 #ifdef CONFIG_BLK_CPQ_DA
 	cpqarray_init();
 #endif
-#ifdef CONFIG_NET
-	net_dev_init();
-#endif
 #ifdef CONFIG_ATM
 	(void) atmdev_init();
 #endif

net/core/dev.c

@@ -2425,7 +2425,7 @@ static int dev_boot_phase = 1;
  *	will not get the same name.
  */
 
-int net_dev_init(void);
+static int net_dev_init(void);
 
 int register_netdevice(struct net_device *dev)
 {
@@ -2691,7 +2691,7 @@ extern void dv_init(void);
  *       Callers must hold the rtnl semaphore.  See the comment at the
  *       end of Space.c for details about the locking.
  */
-int __init net_dev_init(void)
+static int __init net_dev_init(void)
 {
 	struct net_device *dev, **dp;
 	int i;
@@ -2832,6 +2832,8 @@ int __init net_dev_init(void)
 	return 0;
 }
 
+__initcall(net_dev_init);
+
 #ifdef CONFIG_HOTPLUG
 
 /* Notify userspace when a netdevice event occurs,