spi: wpcm-fiu: Fix uninitialized res

	fiu->dev = dev;

	fiu->regs = devm_platform_ioremap_resource_byname(pdev, "control");

	if (IS_ERR(fiu->regs)) {

		dev_err(dev, "Failed to map registers\n");

		return PTR_ERR(fiu->regs);

	}

	if (IS_ERR(fiu->regs))

		return dev_err_probe(dev, PTR_ERR(fiu->regs),

				     "Failed to map registers\n");

	fiu->clk = devm_clk_get_enabled(dev, NULL);

	if (IS_ERR(fiu->clk))

		return PTR_ERR(fiu->clk);

	fiu->memory = devm_platform_ioremap_resource_byname(pdev, "memory");

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "memory");

	fiu->memory = devm_ioremap_resource(dev, res);

	fiu->memory_size = min_t(size_t, resource_size(res), MAX_MEMORY_SIZE_TOTAL);

	if (IS_ERR(fiu->memory)) {

		dev_err(dev, "Failed to map flash memory window\n");

		return PTR_ERR(fiu->memory);

	}

	if (IS_ERR(fiu->memory))

		return dev_err_probe(dev, PTR_ERR(fiu->memory),

			       "Failed to map flash memory window\n");

	fiu->shm_regmap = syscon_regmap_lookup_by_phandle_optional(dev->of_node, "nuvoton,shm");