i2c: imx-lpi2c: Use __maybe_unused instead of #if CONFIG_PM_SLEEP

Use __maybe_unused for power management related functions
instead of #if CONFIG_PM_SLEEP to simply the code.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-imx-lpi2c.c

@@ -639,8 +639,7 @@ static int lpi2c_imx_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int lpi2c_runtime_suspend(struct device *dev)
+static int __maybe_unused lpi2c_runtime_suspend(struct device *dev)
 {
 	struct lpi2c_imx_struct *lpi2c_imx = dev_get_drvdata(dev);
 
@@ -650,7 +649,7 @@ static int lpi2c_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int lpi2c_runtime_resume(struct device *dev)
+static int __maybe_unused lpi2c_runtime_resume(struct device *dev)
 {
 	struct lpi2c_imx_struct *lpi2c_imx = dev_get_drvdata(dev);
 	int ret;
@@ -671,10 +670,6 @@ static const struct dev_pm_ops lpi2c_pm_ops = {
 	SET_RUNTIME_PM_OPS(lpi2c_runtime_suspend,
 			   lpi2c_runtime_resume, NULL)
 };
-#define IMX_LPI2C_PM      (&lpi2c_pm_ops)
-#else
-#define IMX_LPI2C_PM      NULL
-#endif
 
 static struct platform_driver lpi2c_imx_driver = {
 	.probe = lpi2c_imx_probe,
@@ -682,7 +677,7 @@ static struct platform_driver lpi2c_imx_driver = {
 	.driver = {
 		.name = DRIVER_NAME,
 		.of_match_table = lpi2c_imx_of_match,
-		.pm = IMX_LPI2C_PM,
+		.pm = &lpi2c_pm_ops,
 	},
 };