i2c: imx: Use __maybe_unused instead of #if CONFIG_PM

Use __maybe_unused for runtime PM related functions instead
of #if CONFIG_PM to simply the code.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-imx.c

@@ -1220,8 +1220,7 @@ static int i2c_imx_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int i2c_imx_runtime_suspend(struct device *dev)
+static int __maybe_unused i2c_imx_runtime_suspend(struct device *dev)
 {
 	struct imx_i2c_struct *i2c_imx = dev_get_drvdata(dev);
 
@@ -1230,7 +1229,7 @@ static int i2c_imx_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int i2c_imx_runtime_resume(struct device *dev)
+static int __maybe_unused i2c_imx_runtime_resume(struct device *dev)
 {
 	struct imx_i2c_struct *i2c_imx = dev_get_drvdata(dev);
 	int ret;
@@ -1246,17 +1245,13 @@ static const struct dev_pm_ops i2c_imx_pm_ops = {
 	SET_RUNTIME_PM_OPS(i2c_imx_runtime_suspend,
 			   i2c_imx_runtime_resume, NULL)
 };
-#define I2C_IMX_PM_OPS (&i2c_imx_pm_ops)
-#else
-#define I2C_IMX_PM_OPS NULL
-#endif /* CONFIG_PM */
 
 static struct platform_driver i2c_imx_driver = {
 	.probe = i2c_imx_probe,
 	.remove = i2c_imx_remove,
 	.driver = {
 		.name = DRIVER_NAME,
-		.pm = I2C_IMX_PM_OPS,
+		.pm = &i2c_imx_pm_ops,
 		.of_match_table = i2c_imx_dt_ids,
 	},
 	.id_table = imx_i2c_devtype,