tty: serial: qcom_geni: avoid duplicate struct member init

When -Woverride-init is enabled in a build, gcc points out that
qcom_geni_serial_pm_ops contains conflicting initializers:

drivers/tty/serial/qcom_geni_serial.c:1586:20: error: initialized field overwritten [-Werror=override-init]
 1586 |         .restore = qcom_geni_serial_sys_hib_resume,
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/tty/serial/qcom_geni_serial.c:1586:20: note: (near initialization for 'qcom_geni_serial_pm_ops.restore')
drivers/tty/serial/qcom_geni_serial.c:1587:17: error: initialized field overwritten [-Werror=override-init]
 1587 |         .thaw = qcom_geni_serial_sys_hib_resume,
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Open-code the initializers with the version that was already used,
and use the pm_sleep_ptr() method to deal with unused ones,
in place of the __maybe_unused annotation.

Fixes: 35781d8 ("tty: serial: qcom-geni-serial: Add support for Hibernation feature")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20221215165453.1864836-1-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: arndb

drivers/tty/serial/qcom_geni_serial.c

@@ -1530,7 +1530,7 @@ static int qcom_geni_serial_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused qcom_geni_serial_sys_suspend(struct device *dev)
+static int qcom_geni_serial_sys_suspend(struct device *dev)
 {
 	struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
 	struct uart_port *uport = &port->uport;
@@ -1547,7 +1547,7 @@ static int __maybe_unused qcom_geni_serial_sys_suspend(struct device *dev)
 	return uart_suspend_port(private_data->drv, uport);
 }
 
-static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev)
+static int qcom_geni_serial_sys_resume(struct device *dev)
 {
 	int ret;
 	struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
@@ -1595,10 +1595,12 @@ static int qcom_geni_serial_sys_hib_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_sys_suspend,
-					qcom_geni_serial_sys_resume)
-	.restore = qcom_geni_serial_sys_hib_resume,
-	.thaw = qcom_geni_serial_sys_hib_resume,
+	.suspend = pm_sleep_ptr(qcom_geni_serial_sys_suspend),
+	.resume = pm_sleep_ptr(qcom_geni_serial_sys_resume),
+	.freeze = pm_sleep_ptr(qcom_geni_serial_sys_suspend),
+	.poweroff = pm_sleep_ptr(qcom_geni_serial_sys_suspend),
+	.restore = pm_sleep_ptr(qcom_geni_serial_sys_hib_resume),
+	.thaw = pm_sleep_ptr(qcom_geni_serial_sys_hib_resume),
 };
 
 static const struct of_device_id qcom_geni_serial_match_table[] = {