staging: vchiq_arm: remove debugfs entries on module unload

This removes the debugfs entries on module unload and fix one
of the many kernel oops after loading the module again.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c

@@ -2975,6 +2975,7 @@ static int vchiq_probe(struct platform_device *pdev)
 
 static int vchiq_remove(struct platform_device *pdev)
 {
+	vchiq_debugfs_deinit();
 	device_destroy(vchiq_class, vchiq_devid);
 	class_destroy(vchiq_class);
 	cdev_del(&vchiq_cdev);