spi: fsl-lib: Fix memory leak of pinfo

of_mpc8xxx_spi_probe() allocates memory for pinfo but the memory is not freed
anywhere. of_mpc8xxx_spi_probe() is called in .probe() and pinfo should be
freed in .remove(), so convert kzalloc to devm_kzalloc to fix the memory leak.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-fsl-lib.c

@@ -200,7 +200,7 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
 	const void *prop;
 	int ret = -ENOMEM;
 
-	pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
+	pinfo = devm_kzalloc(&ofdev->dev, sizeof(*pinfo), GFP_KERNEL);
 	if (!pinfo)
 		return -ENOMEM;
 
@@ -215,15 +215,13 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
 	pdata->sysclk = get_brgfreq();
 	if (pdata->sysclk == -1) {
 		pdata->sysclk = fsl_get_sys_freq();
-		if (pdata->sysclk == -1) {
-			ret = -ENODEV;
-			goto err;
-		}
+		if (pdata->sysclk == -1)
+			return -ENODEV;
 	}
 #else
 	ret = of_property_read_u32(np, "clock-frequency", &pdata->sysclk);
 	if (ret)
-		goto err;
+		return ret;
 #endif
 
 	prop = of_get_property(np, "mode", NULL);
@@ -237,8 +235,4 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
 		pdata->flags = SPI_CPM_MODE | SPI_CPM1;
 
 	return 0;
-
-err:
-	kfree(pinfo);
-	return ret;
 }