PCI: remove unused AER functions

In the commit 28eb5f27, aer_osc_setup is removed but corresponding
definiton information in the aerdrv.h is missed.
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NChen Gong <gong.chen@linux.intel.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/pcie/aer/aerdrv.h

@@ -114,15 +114,6 @@ extern void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
 extern void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info);
 extern irqreturn_t aer_irq(int irq, void *context);
 
-#ifdef CONFIG_ACPI
-extern int aer_osc_setup(struct pcie_device *pciedev);
-#else
-static inline int aer_osc_setup(struct pcie_device *pciedev)
-{
-	return 0;
-}
-#endif
-
 #ifdef CONFIG_ACPI_APEI
 extern int pcie_aer_get_firmware_first(struct pci_dev *pci_dev);
 #else