drm: rework PCI/platform driver interface.

This abstracts the pci/platform interface out a step further,
we can go further but this is far enough for now to allow USB
to be plugged in.

The drivers now just call the init code directly for their
device type.

Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_info.c

@@ -47,30 +47,19 @@ int drm_name_info(struct seq_file *m, void *data)
 	struct drm_minor *minor = node->minor;
 	struct drm_device *dev = minor->dev;
 	struct drm_master *master = minor->master;
-
+	const char *bus_name;
 	if (!master)
 		return 0;
 
-	if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE)) {
-		if (master->unique) {
-			seq_printf(m, "%s %s %s\n",
-					dev->driver->platform_device->name,
-					dev_name(dev->dev), master->unique);
-		} else {
-			seq_printf(m, "%s\n",
-				dev->driver->platform_device->name);
-		}
+	bus_name = dev->driver->bus->get_name(dev);
+	if (master->unique) {
+		seq_printf(m, "%s %s %s\n",
+			   bus_name,
+			   dev_name(dev->dev), master->unique);
 	} else {
-		if (master->unique) {
-			seq_printf(m, "%s %s %s\n",
-				dev->driver->pci_driver.name,
-				dev_name(dev->dev), master->unique);
-		} else {
-			seq_printf(m, "%s %s\n", dev->driver->pci_driver.name,
-				dev_name(dev->dev));
-		}
+		seq_printf(m, "%s %s\n",
+			   bus_name, dev_name(dev->dev));
 	}
-
 	return 0;
 }