mmc: rtsx_usb_sdmmc: Enable runtime PM autosuspend

Enable runtime PM autosuspend for the rtsx_usb_sdmmc driver to avoid the
device being runtime suspended and runtime resumed between each request.
Let's use a default timeout of 50ms, to be consistent with other mmc hosts.

Cc: Ritesh Raj Sarraf <[e-mail]>
Cc: Alan Stern <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/rtsx_usb_sdmmc.c

···
 
 	mutex_init(&host->host_mutex);
 	rtsx_usb_init_host(host);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
 	pm_runtime_enable(&pdev->dev);
 
 #ifdef RTSX_USB_USE_LEDS_CLASS
···
 
 	mmc_free_host(mmc);
 	pm_runtime_disable(&pdev->dev);
+	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	platform_set_drvdata(pdev, NULL);
 
 	dev_dbg(&(pdev->dev),