ide: add ide_proc_register_port()

* create_proc_ide_interfaces() tries to add /proc entries for every probed
  and initialized IDE port, replace it by ide_proc_register_port() which does
  it only for the given port (also rename destroy_proc_ide_interface() to
  ide_proc_unregister_port() for consistency)
  
* convert {create,destroy}_proc_ide_interface[s]() users to use new functions

* pmac driver depended on proc_ide_create() to add /proc port entries, fix it
  
* au1xxx-ide, swarm and cs5520 drivers depended indirectly on ide-generic
  driver (CONFIG_IDE_GENERIC=y) to add port /proc entries, fix them

* there is now no need to add /proc entries for IDE ports in proc_ide_create()
  so don't do it

* proc_ide_create() needs now to be called before drivers are probed - fix it,
  while at it make proc_ide_create() create /proc "ide" directory

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide.c

@@ -347,10 +347,6 @@ static int ide_system_bus_speed(void)
 	return system_bus_speed;
 }
 
-#ifdef CONFIG_IDE_PROC_FS
-struct proc_dir_entry *proc_ide_root;
-#endif
-
 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 					    unsigned long addr, int num)
 {
@@ -594,7 +590,7 @@ void ide_unregister(unsigned int index)
 
 	spin_unlock_irq(&ide_lock);
 
-	destroy_proc_ide_interface(hwif);
+	ide_proc_unregister_port(hwif);
 
 	hwgroup = hwif->hwgroup;
 	/*
@@ -799,7 +795,7 @@ found:
 
 	if (!initializing) {
 		probe_hwif_init_with_fixup(hwif, fixup);
-		create_proc_ide_interfaces();
+		ide_proc_register_port(hwif);
 	}
 
 	if (hwifp)
@@ -1794,9 +1790,7 @@ static int __init ide_init(void)
 
 	init_ide_data();
 
-#ifdef CONFIG_IDE_PROC_FS
-	proc_ide_root = proc_mkdir("ide", NULL);
-#endif
+	proc_ide_create();
 
 #ifdef CONFIG_BLK_DEV_ALI14XX
 	if (probe_ali14xx)
@@ -1822,8 +1816,6 @@ static int __init ide_init(void)
 	/* Probe for special PCI and other "known" interface chipsets. */
 	probe_for_hwifs();
 
-	proc_ide_create();
-
 	return 0;
 }