PM / devfreq: imx8m-ddrc: Fix inconsistent IS_ERR and PTR_ERR

	}

	priv->dram_core = devm_clk_get(dev, "core");

	if (IS_ERR(priv->dram_core)) {

		ret = PTR_ERR(priv->dram_core);

		dev_err(dev, "failed to fetch core clock: %d\n", ret);

		return ret;

	}

	priv->dram_pll = devm_clk_get(dev, "pll");

	if (IS_ERR(priv->dram_pll)) {

		ret = PTR_ERR(priv->dram_pll);

		dev_err(dev, "failed to fetch pll clock: %d\n", ret);

		return ret;

	}

	priv->dram_alt = devm_clk_get(dev, "alt");

	if (IS_ERR(priv->dram_alt)) {

		ret = PTR_ERR(priv->dram_alt);

		dev_err(dev, "failed to fetch alt clock: %d\n", ret);

		return ret;

	}

	priv->dram_apb = devm_clk_get(dev, "apb");

	if (IS_ERR(priv->dram_core) ||

		IS_ERR(priv->dram_pll) ||

		IS_ERR(priv->dram_alt) ||

		IS_ERR(priv->dram_apb)) {

		ret = PTR_ERR(priv->devfreq);

		dev_err(dev, "failed to fetch clocks: %d\n", ret);

	if (IS_ERR(priv->dram_apb)) {

		ret = PTR_ERR(priv->dram_apb);

		dev_err(dev, "failed to fetch apb clock: %d\n", ret);

		return ret;

	}