platform/chrome: cros_ec: remove unneeded label and if-condition

Both `ec_dev->ec` and `ec_dev->pd` are initialized to NULL at the
beginning of cros_ec_register().  Also, platform_device_unregister()
takes care if the given platform_device is NULL.

Remove the unneeded goto-label and if-condition.
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Link: https://lore.kernel.org/r/20230308031247.2866401-1-tzungbi@kernel.org

drivers/platform/chrome/cros_ec.c

@@ -206,7 +206,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 	err = cros_ec_query_all(ec_dev);
 	if (err) {
 		dev_err(dev, "Cannot identify the EC: error %d\n", err);
-		goto destroy_mutex;
+		goto exit;
 	}
 
 	if (ec_dev->irq > 0) {
@@ -218,7 +218,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 		if (err) {
 			dev_err(dev, "Failed to request IRQ %d: %d\n",
 				ec_dev->irq, err);
-			goto destroy_mutex;
+			goto exit;
 		}
 	}
 
@@ -230,7 +230,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 		dev_err(ec_dev->dev,
 			"Failed to create CrOS EC platform device\n");
 		err = PTR_ERR(ec_dev->ec);
-		goto destroy_mutex;
+		goto exit;
 	}
 
 	if (ec_dev->max_passthru) {
@@ -296,7 +296,6 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 exit:
 	platform_device_unregister(ec_dev->ec);
 	platform_device_unregister(ec_dev->pd);
-destroy_mutex:
 	mutex_destroy(&ec_dev->lock);
 	lockdep_unregister_key(&ec_dev->lockdep_key);
 	return err;
@@ -313,8 +312,7 @@ EXPORT_SYMBOL(cros_ec_register);
  */
 void cros_ec_unregister(struct cros_ec_device *ec_dev)
 {
-	if (ec_dev->pd)
-		platform_device_unregister(ec_dev->pd);
+	platform_device_unregister(ec_dev->pd);
 	platform_device_unregister(ec_dev->ec);
 	mutex_destroy(&ec_dev->lock);
 	lockdep_unregister_key(&ec_dev->lockdep_key);