staging/crystalhd: unregister chardev when class_create fails in chd_dec_init_chdev

we missed a unregiser_chrdev if the class_create and subsequent function calls / checks fail
Signed-off-by: NDevendra Naga <develkernel412222@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/crystalhd/crystalhd_lnx.c

@@ -375,7 +375,7 @@ static int __devinit chd_dec_init_chdev(struct crystalhd_adp *adp)
 	if (IS_ERR(crystalhd_class)) {
 		rc = PTR_ERR(crystalhd_class);
 		BCMLOG_ERR("failed to create class\n");
-		goto fail;
+		goto class_create_fail;
 	}
 
 	dev = device_create(crystalhd_class, NULL, MKDEV(adp->chd_dec_major, 0),
@@ -412,6 +412,8 @@ static int __devinit chd_dec_init_chdev(struct crystalhd_adp *adp)
 	device_destroy(crystalhd_class, MKDEV(adp->chd_dec_major, 0));
 device_create_fail:
 	class_destroy(crystalhd_class);
+class_create_fail:
+	unregister_chrdev(adp->chd_dec_major, CRYSTALHD_API_NAME);
 fail:
 	return rc;
 }