i2c: qup: Add missing unwind goto in qup_i2c_probe()

Smatch Warns:
	drivers/i2c/busses/i2c-qup.c:1784 qup_i2c_probe()
	warn: missing unwind goto?

The goto label "fail_runtime" and "fail" will disable qup->pclk,
but here qup->pclk failed to obtain, in order to be consistent,
change the direct return to goto label "fail_dma".

Fixes: 9cedf3b ("i2c: qup: Add bam dma capabilities")
Signed-off-by: Shuai Jiang <d202180596@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Cc: <stable@vger.kernel.org> # v4.6+

drivers/i2c/busses/i2c-qup.c

@@ -1752,16 +1752,21 @@ static int qup_i2c_probe(struct platform_device *pdev)
 	if (!clk_freq || clk_freq > I2C_MAX_FAST_MODE_PLUS_FREQ) {
 		dev_err(qup->dev, "clock frequency not supported %d\n",
 			clk_freq);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto fail_dma;
 	}
 
 	qup->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(qup->base))
-		return PTR_ERR(qup->base);
+	if (IS_ERR(qup->base)) {
+		ret = PTR_ERR(qup->base);
+		goto fail_dma;
+	}
 
 	qup->irq = platform_get_irq(pdev, 0);
-	if (qup->irq < 0)
-		return qup->irq;
+	if (qup->irq < 0) {
+		ret = qup->irq;
+		goto fail_dma;
+	}
 
 	if (has_acpi_companion(qup->dev)) {
 		ret = device_property_read_u32(qup->dev,
@@ -1775,13 +1780,15 @@ static int qup_i2c_probe(struct platform_device *pdev)
 		qup->clk = devm_clk_get(qup->dev, "core");
 		if (IS_ERR(qup->clk)) {
 			dev_err(qup->dev, "Could not get core clock\n");
-			return PTR_ERR(qup->clk);
+			ret = PTR_ERR(qup->clk);
+			goto fail_dma;
 		}
 
 		qup->pclk = devm_clk_get(qup->dev, "iface");
 		if (IS_ERR(qup->pclk)) {
 			dev_err(qup->dev, "Could not get iface clock\n");
-			return PTR_ERR(qup->pclk);
+			ret = PTR_ERR(qup->pclk);
+			goto fail_dma;
 		}
 		qup_i2c_enable_clocks(qup);
 		src_clk_freq = clk_get_rate(qup->clk);