V4L/DVB (13616): IR: rename ir_input_free as ir_input_unregister

Now, ir_input_free does more than just freeing the keytab. Better to
rename it as ir_input_unregister.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/em28xx/em28xx-input.c b/drivers/media/video/em28xx/em28xx-input.c
index 5ddeb42..9dc4e14 100644
--- a/drivers/media/video/em28xx/em28xx-input.c
+++ b/drivers/media/video/em28xx/em28xx-input.c
@@ -422,7 +422,7 @@
 	em28xx_ir_stop(ir);
 	dev->ir = NULL;
  err_out_free:
-	ir_input_free(input_dev);
+	ir_input_unregister(input_dev);
 	input_free_device(input_dev);
 	kfree(ir);
 	return err;
@@ -437,7 +437,7 @@
 		return 0;
 
 	em28xx_ir_stop(ir);
-	ir_input_free(ir->input);
+	ir_input_unregister(ir->input);
 	input_unregister_device(ir->input);
 	kfree(ir);