scsi: a4000 - Correct driver unregistration in case of failure

commit 7a192ec334cab9fafe3a8665a65af398b0e24730 ("platform driver: fix
incorrect use of 'platform_bus_type' with 'struct device_driver') turned a
driver_UNregister into platform_driver_REGISTER. Correct this to
platform_driver_UNregister.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/drivers/scsi/a4000t.c b/drivers/scsi/a4000t.c
index 61af3d91..e3519fa 100644
--- a/drivers/scsi/a4000t.c
+++ b/drivers/scsi/a4000t.c
@@ -129,7 +129,7 @@
 	a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
 			-1, NULL, 0);
 	if (IS_ERR(a4000t_scsi_device)) {
-		platform_driver_register(&a4000t_scsi_driver);
+		platform_driver_unregister(&a4000t_scsi_driver);
 		return PTR_ERR(a4000t_scsi_device);
 	}