PCI/AER: Cache capability position

Save the position of the error reporting capability so it doesn't need to
be rediscovered during error handling.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Lukas Wunner <lukas@wunner.de>
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 93f280d..1575724 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1666,7 +1666,8 @@
 	/* Enable ACS P2P upstream forwarding */
 	pci_enable_acs(dev);
 
-	pci_cleanup_aer_error_status_regs(dev);
+	/* Advanced Error Reporting */
+	pci_aer_init(dev);
 }
 
 /*