spi: bfin-v3: use devm_spi_register_master()

Use devm_spi_register_master() to make cleanup paths simpler.

Signed-off-by: Jingoo Han <[e-mail]>
Acked-by: Scott Jiang <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-bfin-v3.c

···
 	tasklet_init(&drv_data->pump_transfers,
 			bfin_spi_pump_transfers, (unsigned long)drv_data);
 	/* register with the SPI framework */
-	ret = spi_register_master(master);
+	ret = devm_spi_register_master(dev, master);
 	if (ret) {
 		dev_err(dev, "can not  register spi master\n");
 		goto err_free_peripheral;
···
 	free_dma(drv_data->rx_dma);
 	free_dma(drv_data->tx_dma);
 
-	spi_unregister_master(drv_data->master);
 	return 0;
 }