tpm/tpm_ftpm_tee: Make use of tee specific driver registration

tee_client_driver_register() is typed more strongly and cares about
assigning the driver's bus. Similar for tee_client_driver_unregister().

Make use of these functions.

Reviewed-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

Author: ukleinek

drivers/char/tpm/tpm_ftpm_tee.c

@@ -338,7 +338,6 @@ static struct tee_client_driver ftpm_tee_driver = {
 	.id_table	= optee_ftpm_id_table,
 	.driver		= {
 		.name		= "optee-ftpm",
-		.bus		= &tee_bus_type,
 		.probe		= ftpm_tee_probe,
 		.remove		= ftpm_tee_remove,
 	},
@@ -352,7 +351,7 @@ static int __init ftpm_mod_init(void)
 	if (rc)
 		return rc;
 
-	rc = driver_register(&ftpm_tee_driver.driver);
+	rc = tee_client_driver_register(&ftpm_tee_driver);
 	if (rc) {
 		platform_driver_unregister(&ftpm_tee_plat_driver);
 		return rc;
@@ -364,7 +363,7 @@ static int __init ftpm_mod_init(void)
 static void __exit ftpm_mod_exit(void)
 {
 	platform_driver_unregister(&ftpm_tee_plat_driver);
-	driver_unregister(&ftpm_tee_driver.driver);
+	tee_client_driver_unregister(&ftpm_tee_driver);
 }
 
 module_init(ftpm_mod_init);