Revert "drm: apple: HACK: Do not delete piodma platform device"

This reverts commit fa86f31.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

drivers/gpu/drm/apple/dcp.c

@@ -1073,10 +1073,7 @@ static void dcp_comp_unbind(struct device *dev, struct device *main, void *data)
 	if (dcp->piodma) {
 		iommu_detach_device(dcp->iommu_dom, &dcp->piodma->dev);
 		iommu_domain_free(dcp->iommu_dom);
-		/* TODO: the piodma platform device has to be destroyed but
-		 *       doing so leads to all kind of breakage.
-		 */
-		// of_platform_device_destroy(&dcp->piodma->dev, NULL);
+		of_platform_device_destroy(&dcp->piodma->dev, NULL);
 		dcp->piodma = NULL;
 	}