panel/innolux-p079zca: Use refcounted allocation in place of devm_kzalloc()

Move to using the new API devm_drm_panel_alloc() to allocate the
panel.

Reviewed-by: Neil Armstrong <[e-mail]>
Signed-off-by: Anusha Srivatsa <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Maxime Ripard <[e-mail]>

drivers/gpu/drm/panel/panel-innolux-p079zca.c

···
 	struct device *dev = &dsi->dev;
 	int err, i;
 
-	innolux = devm_kzalloc(dev, sizeof(*innolux), GFP_KERNEL);
-	if (!innolux)
-		return -ENOMEM;
+	innolux = devm_drm_panel_alloc(dev, struct innolux_panel, base,
+				       &innolux_panel_funcs,
+				       DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(innolux))
+		return PTR_ERR(innolux);
 
 	innolux->desc = desc;
 
···
 		dev_dbg(dev, "failed to get enable gpio: %d\n", err);
 		innolux->enable_gpio = NULL;
 	}
-
-	drm_panel_init(&innolux->base, dev, &innolux_panel_funcs,
-		       DRM_MODE_CONNECTOR_DSI);
 
 	err = drm_panel_of_backlight(&innolux->base);
 	if (err)