Input: atmel_tsadcc - correct call to input_free_device

This error handling code can be reached before ts_dev->input is
initialized, so it is safer to always use the original name,
input_dev.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/atmel_tsadcc.c

@@ -317,7 +317,7 @@ err_unmap_regs:
 err_release_mem:
 	release_mem_region(res->start, resource_size(res));
 err_free_dev:
-	input_free_device(ts_dev->input);
+	input_free_device(input_dev);
 err_free_mem:
 	kfree(ts_dev);
 	return err;