PCI aer: fix stub return values

The stubs used when advanced error reporting is not enabled
must have same return type as real functions.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Acked-by: NZhang Yanmin <yanmin.zhang@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

include/linux/aer.h

@@ -14,10 +14,10 @@ extern int pci_find_aer_capability(struct pci_dev *dev);
 extern int pci_disable_pcie_error_reporting(struct pci_dev *dev);
 extern int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);
 #else
-#define pci_enable_pcie_error_reporting(dev)		do { } while (0)
-#define pci_find_aer_capability(dev)			do { } while (0)
-#define pci_disable_pcie_error_reporting(dev)		do { } while (0)
-#define pci_cleanup_aer_uncorrect_error_status(dev)	do { } while (0)
+#define pci_enable_pcie_error_reporting(dev)		(-EINVAL)
+#define pci_find_aer_capability(dev)			(0)
+#define pci_disable_pcie_error_reporting(dev)		(-EINVAL)
+#define pci_cleanup_aer_uncorrect_error_status(dev)	(-EINVAL)
 #endif
 
 #endif //_AER_H_