ASoC: stm32: sai: fix device leak on probe

Make sure to drop the reference taken when looking up the sync provider
device and its driver data during DAI probe on probe failures and on
unbind.

Note that holding a reference to a device does not prevent its driver
data from going away so there is no point in keeping the reference.

Fixes: 7dd0d835582f ("ASoC: stm32: sai: simplify sync modes management")
Fixes: 1c3816a19487 ("ASoC: stm32: sai: add missing put_device()")
Cc: [e-mail] # 4.16: 1c3816a19487
Cc: olivier moysan <[e-mail]>
Cc: Wen Yang <[e-mail]>
Signed-off-by: Johan Hovold <[e-mail]>
Reviewed-by: olivier moysan <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/stm/stm32_sai.c

···
 	}
 
 	sai_provider = platform_get_drvdata(pdev);
+	put_device(&pdev->dev);
 	if (!sai_provider) {
 		dev_err(&sai_client->pdev->dev,
 			"SAI sync provider data not found\n");
···
 	ret = stm32_sai_sync_conf_provider(sai_provider, synco);
 
 error:
-	put_device(&pdev->dev);
 	of_node_put(np_provider);
 	return ret;
 }