ASoC: fsl_asrc: Use 'ifdef' for config options

Fix the following build errors that were observed by building with
make ARCH=microblaze allyesconfig:

>> sound/soc/fsl/fsl_asrc.c:906:5: warning: "CONFIG_PM_RUNTIME" is not defined [-Wundef]
    #if CONFIG_PM_RUNTIME
        ^
>> sound/soc/fsl/fsl_asrc.c:934:5: warning: "CONFIG_PM_SLEEP" is not defined [-Wundef]
    #if CONFIG_PM_SLEEP
        ^
>> sound/soc/fsl/fsl_asrc.c:906:5: warning: "CONFIG_PM_RUNTIME" is not defined [-Wundef]
    #if CONFIG_PM_RUNTIME
        ^
>> sound/soc/fsl/fsl_asrc.c:934:5: warning: "CONFIG_PM_SLEEP" is not defined [-Wundef]
    #if CONFIG_PM_SLEEP
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/fsl/fsl_asrc.c

@@ -903,7 +903,7 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-#if CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM_RUNTIME
 static int fsl_asrc_runtime_resume(struct device *dev)
 {
 	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
@@ -931,7 +931,7 @@ static int fsl_asrc_runtime_suspend(struct device *dev)
 }
 #endif /* CONFIG_PM_RUNTIME */
 
-#if CONFIG_PM_SLEEP
+#ifdef CONFIG_PM_SLEEP
 static int fsl_asrc_suspend(struct device *dev)
 {
 	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);