panel/samsung-s6e63j0x03: 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/20[e-mail]
Signed-off-by: Maxime Ripard <[e-mail]>

drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c

···
 	struct s6e63j0x03 *ctx;
 	int ret;
 
-	ctx = devm_kzalloc(dev, sizeof(struct s6e63j0x03), GFP_KERNEL);
-	if (!ctx)
-		return -ENOMEM;
+	ctx = devm_drm_panel_alloc(dev, struct s6e63j0x03, panel,
+				   &s6e63j0x03_funcs,
+				   DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
 
 	mipi_dsi_set_drvdata(dsi, ctx);
 
···
 		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
 				     "cannot get reset-gpio\n");
 
-	drm_panel_init(&ctx->panel, dev, &s6e63j0x03_funcs,
-		       DRM_MODE_CONNECTOR_DSI);
 	ctx->panel.prepare_prev_first = true;
 
 	ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx,