[ide] make destroy_proc_ide_interfaces static

destroy_proc_ide_interfaces is only used inside ide-proc.c;
so lets make it static.
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-proc.c

@@ -476,7 +476,7 @@ void destroy_proc_ide_interface(ide_hwif_t *hwif)
 	}
 }
 
-void destroy_proc_ide_interfaces(void)
+static void destroy_proc_ide_interfaces(void)
 {
 	int	h;
 
@@ -490,8 +490,6 @@ void destroy_proc_ide_interfaces(void)
 	}
 }
 
-EXPORT_SYMBOL(destroy_proc_ide_interfaces);
-
 extern struct seq_operations ide_drivers_op;
 static int ide_drivers_open(struct inode *inode, struct file *file)
 {