panel/sony-acx565akm: 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-sony-acx565akm.c

···
 	struct acx565akm_panel *lcd;
 	int ret;
 
-	lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
-	if (!lcd)
-		return -ENOMEM;
+	lcd = devm_drm_panel_alloc(&spi->dev, struct acx565akm_panel, panel,
+				   &acx565akm_funcs, DRM_MODE_CONNECTOR_DPI);
+	if (IS_ERR(lcd))
+		return PTR_ERR(lcd);
 
 	spi_set_drvdata(spi, lcd);
 	spi->mode = SPI_MODE_3;
···
 		if (ret < 0)
 			return ret;
 	}
-
-	drm_panel_init(&lcd->panel, &lcd->spi->dev, &acx565akm_funcs,
-		       DRM_MODE_CONNECTOR_DPI);
 
 	drm_panel_add(&lcd->panel);