drm: sti: make driver use devm_of_platform_populate()

This make sure that of_platform_depopulate() is called if an error
occur in probe after populating the date from the device tree.

Signed-off-by: Benjamin Gaignard <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/sti/sti_drv.c

···
 
 	dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 
-	of_platform_populate(node, NULL, NULL, dev);
+	devm_of_platform_populate(dev);
 
 	child_np = of_get_next_available_child(node, NULL);
 
···
 static int sti_platform_remove(struct platform_device *pdev)
 {
 	component_master_del(&pdev->dev, &sti_ops);
-	of_platform_depopulate(&pdev->dev);
 
 	return 0;
 }