PCI/AER: Move internal declarations to drivers/pci/pci.h

Since pci_aer_init() and pci_no_aer() are used only internally, move their
declarations to the PCI internal header file.  Also, no one cares about
return value of pci_aer_init(), so make it void.

Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/pcie/aer.c

@@ -382,10 +382,10 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
 	return 0;
 }
 
-int pci_aer_init(struct pci_dev *dev)
+void pci_aer_init(struct pci_dev *dev)
 {
 	dev->aer_cap = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
-	return pci_cleanup_aer_error_status_regs(dev);
+	pci_cleanup_aer_error_status_regs(dev);
 }
 
 #define AER_AGENT_RECEIVER		0