spi: s3c64xx: use error code from clk_prepare_enable()

If clk_prepare_enable() fails do not return -EBUSY but use the
value provided by the function itself.
Suggested-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NAndi Shyti <andi.shyti@samsung.com>
Reviewed-by: NMichael Turquette <mturquette@baylibre.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-s3c64xx.c

@@ -1133,9 +1133,9 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
 		goto err_deref_master;
 	}
 
-	if (clk_prepare_enable(sdd->clk)) {
+	ret = clk_prepare_enable(sdd->clk);
+	if (ret) {
 		dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n");
-		ret = -EBUSY;
 		goto err_deref_master;
 	}
 
@@ -1148,9 +1148,9 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
 		goto err_disable_clk;
 	}
 
-	if (clk_prepare_enable(sdd->src_clk)) {
+	ret = clk_prepare_enable(sdd->src_clk);
+	if (ret) {
 		dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name);
-		ret = -EBUSY;
 		goto err_disable_clk;
 	}