i2c: ismt: PCI core handles power state for us

There is no need to repeat the work that is already done in the PCI driver
core. Remove suspend and resume callbacks.

Note that there is no more calls performed to enable or disable a PCI
device during suspend-resume cycle. Nowadays they seems to be
superfluous. Someone can read more in [1].

[1] https://www.kernel.org/doc/ols/2009/ols2009-pages-319-330.pdf

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-ismt.c

@@ -947,44 +947,11 @@ static void ismt_remove(struct pci_dev *pdev)
 	i2c_del_adapter(&priv->adapter);
 }
 
-/**
- * ismt_suspend() - place the device in suspend
- * @pdev: PCI-Express device
- * @mesg: PM message
- */
-#ifdef CONFIG_PM
-static int ismt_suspend(struct pci_dev *pdev, pm_message_t mesg)
-{
-	pci_save_state(pdev);
-	pci_set_power_state(pdev, pci_choose_state(pdev, mesg));
-	return 0;
-}
-
-/**
- * ismt_resume() - PCI resume code
- * @pdev: PCI-Express device
- */
-static int ismt_resume(struct pci_dev *pdev)
-{
-	pci_set_power_state(pdev, PCI_D0);
-	pci_restore_state(pdev);
-	return pci_enable_device(pdev);
-}
-
-#else
-
-#define ismt_suspend NULL
-#define ismt_resume NULL
-
-#endif
-
 static struct pci_driver ismt_driver = {
 	.name = "ismt_smbus",
 	.id_table = ismt_ids,
 	.probe = ismt_probe,
 	.remove = ismt_remove,
-	.suspend = ismt_suspend,
-	.resume = ismt_resume,
 };
 
 module_pci_driver(ismt_driver);