Input: revert some over-zealous conversions to module_platform_driver()

Recent conversion to module_platform_driver() went a bit too far and
converted not only drivers that used platform_driver_register() but
also ones using platform_driver_probe(), breaking them in process.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/serio/at32psif.c b/drivers/input/serio/at32psif.c
index 421a744..95280f9 100644
--- a/drivers/input/serio/at32psif.c
+++ b/drivers/input/serio/at32psif.c
@@ -358,7 +358,19 @@
 	.suspend	= psif_suspend,
 	.resume		= psif_resume,
 };
-module_platform_driver(psif_driver);
+
+static int __init psif_init(void)
+{
+	return platform_driver_probe(&psif_driver, psif_probe);
+}
+
+static void __exit psif_exit(void)
+{
+	platform_driver_unregister(&psif_driver);
+}
+
+module_init(psif_init);
+module_exit(psif_exit);
 
 MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
 MODULE_DESCRIPTION("Atmel AVR32 PSIF PS/2 driver");