macintosh/ams: Remove unneeded result variable

Return the value from i2c_add_driver() directly instead of storing it in
another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220118075252.925616-1-chi.minghao@zte.com.cn

drivers/macintosh/ams/ams-i2c.c

@@ -256,8 +256,6 @@ static void ams_i2c_exit(void)
 
 int __init ams_i2c_init(struct device_node *np)
 {
-	int result;
-
 	/* Set implementation stuff */
 	ams_info.of_node = np;
 	ams_info.exit = ams_i2c_exit;
@@ -266,7 +264,5 @@ int __init ams_i2c_init(struct device_node *np)
 	ams_info.clear_irq = ams_i2c_clear_irq;
 	ams_info.bustype = BUS_I2C;
 
-	result = i2c_add_driver(&ams_i2c_driver);
-
-	return result;
+	return i2c_add_driver(&ams_i2c_driver);
 }