[ACPI] fix debug-mode build warning in acpi/hotkey.c

drivers/acpi/hotkey.c: In function `create_polling_proc':
drivers/acpi/hotkey.c:334: warning: ISO C90 forbids mixed declarations and code
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/acpi/hotkey.c

@@ -329,9 +329,10 @@ static int auto_hotkey_remove(struct acpi_device *device, int type)
 static int create_polling_proc(union acpi_hotkey *device)
 {
 	struct proc_dir_entry *proc;
+	mode_t mode;
 
 	ACPI_FUNCTION_TRACE("create_polling_proc");
-	mode_t mode = S_IFREG | S_IRUGO | S_IWUGO;
+	mode = S_IFREG | S_IRUGO | S_IWUGO;
 
 	proc = create_proc_entry(device->poll_hotkey.action_method,
 				 mode, hotkey_proc_dir);