spi: rockchip: disable runtime pm when in err case

Before registering master, driver enables runtime pm.
This patch  pm_runtime_disable in err case while probing
driver to balance pm reference count.
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-rockchip.c

@@ -749,6 +749,7 @@ static int rockchip_spi_probe(struct platform_device *pdev)
 	return 0;
 
 err_register_master:
+	pm_runtime_disable(&pdev->dev);
 	if (rs->dma_tx.ch)
 		dma_release_channel(rs->dma_tx.ch);
 	if (rs->dma_rx.ch)