[PATCH -next] mchp_pci1xxxx: gpio: fix unused function compile warning

[Zeng Heng <zengheng4@xxxxxxxxxx>]

Fix below compile warning when CONFIG_PM_SLEEP
feature is disabled:

drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c:311:12: error: ‘pci1xxxx_gpio_resume’ defined but not used [-Werror=unused-function]
  311 | static int pci1xxxx_gpio_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~
drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c:295:12: error: ‘pci1xxxx_gpio_suspend’ defined but not used [-Werror=unused-function]
  295 | static int pci1xxxx_gpio_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~

Using these DEFINE_SIMPLE_DEV_PM_OPS() and
pm_sleep_ptr() macros which allows the compiler
to remove the unused structure and functions
when !CONFIG_PM_SLEEP.

Signed-off-by: Zeng Heng <zengheng4@xxxxxxxxxx>
---
 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
index 9cc771c604ed..9735d5b74c8f 100644
--- a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
@@ -405,7 +405,7 @@ static int pci1xxxx_gpio_probe(struct auxiliary_device *aux_dev,
 	return devm_gpiochip_add_data(&aux_dev->dev, &priv->gpio, priv);
 }
 
-static SIMPLE_DEV_PM_OPS(pci1xxxx_gpio_pm_ops, pci1xxxx_gpio_suspend, pci1xxxx_gpio_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(pci1xxxx_gpio_pm_ops, pci1xxxx_gpio_suspend, pci1xxxx_gpio_resume);
 
 static const struct auxiliary_device_id pci1xxxx_gpio_auxiliary_id_table[] = {
 	{.name = "mchp_pci1xxxx_gp.gp_gpio"},
@@ -416,8 +416,8 @@ MODULE_DEVICE_TABLE(auxiliary, pci1xxxx_gpio_auxiliary_id_table);
 static struct auxiliary_driver pci1xxxx_gpio_driver = {
 	.driver = {
 		.name = "PCI1xxxxGPIO",
-		.pm = &pci1xxxx_gpio_pm_ops,
-		},
+		.pm = pm_sleep_ptr(&pci1xxxx_gpio_pm_ops),
+	},
 	.probe = pci1xxxx_gpio_probe,
 	.id_table = pci1xxxx_gpio_auxiliary_id_table
 };
-- 
2.25.1