spi: pxa2xx: Disable runtime PM if controller registration fails

Don't leave runtime PM enabled in case devm_spi_register_controller()
returns with an error. Otherwise runtime PM will complain when driver is
reloaded:

[  693.855811] pxa2xx-spi pxa2xx-spi.13: Unbalanced pm_runtime_enable!
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pxa2xx.c

@@ -1802,6 +1802,8 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	return status;
 
 out_error_clock_enabled:
+	pm_runtime_put_noidle(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 	clk_disable_unprepare(ssp->clk);
 	pxa2xx_spi_dma_release(drv_data);
 	free_irq(ssp->irq, drv_data);