spmi: Add del_controller functionality

The del_controller function is required to release any client device
resources as well as the debugfs entries.  This patch adds that
functionality.

Change-Id: I91c6b840acfe002f096570cbe1867b302c475e60
Signed-off-by: Kenneth Heitke <kheitke@codeaurora.org>
diff --git a/drivers/spmi/spmi-dbgfs.h b/drivers/spmi/spmi-dbgfs.h
index 2a0d815..10e98b9 100644
--- a/drivers/spmi/spmi-dbgfs.h
+++ b/drivers/spmi/spmi-dbgfs.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -16,8 +16,10 @@
 
 #ifdef CONFIG_DEBUG_FS
 int spmi_dfs_add_controller(struct spmi_controller *ctrl);
+int spmi_dfs_del_controller(struct spmi_controller *ctrl);
 #else
 static int spmi_dfs_add_controller(struct spmi_controller *ctrl) { return 0; }
+static int spmi_dfs_del_controller(struct spmi_controller *ctrl) { return 0; }
 #endif
 
 struct dentry *spmi_dfs_create_file(struct spmi_controller *ctrl,