PCI ACPI: Fix comment describing acpi_pci_choose_state

The last line of the comment preceding the definition of
acpi_pci_choose_state() is incorrect.  Remove it.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/pci/pci-acpi.c

@@ -241,8 +241,6 @@ EXPORT_SYMBOL(pci_osc_control_set);
  *	choose from highest power _SxD to lowest power _SxW
  * else // no _PRW at S-state x
  * 	choose highest power _SxD or any lower power
- *
- * currently we simply return _SxD, if present.
  */
 
 static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev,