greybus: arche-platform: Cancel delayed_work in driver remove fn

This is a bug fix, where as part of cleanup, delayed work was not
canceled in driver remove function. So fix it.

Testing Done: Tested on EVT1.2 and DB3.5 platform.
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/arche-platform.c

@@ -262,6 +262,7 @@ static int arche_platform_remove(struct platform_device *pdev)
 {
 	struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
 
+	cancel_delayed_work_sync(&arche_pdata->delayed_work);
 	device_for_each_child(&pdev->dev, NULL, arche_remove_child);
 	arche_platform_cleanup(arche_pdata);
 	platform_set_drvdata(pdev, NULL);