PCI/AER: Remove redundant dev->aer_cap checks

pcie_aer_get_firmware_first() checks dev->aer_cap, so we can remove
redundant dev->aer_cap checks in the callers.

Link: https://lore.kernel.org/r/d5ccc7a060ec9cdc234bdae7df8a0a4410f13f42.1590534843.git.sathyanarayanan.kuppuswamy@linux.intel.comSigned-off-by: NKuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

drivers/pci/pcie/aer.c

@@ -253,13 +253,9 @@ void pci_aer_clear_device_status(struct pci_dev *dev)
 
 int pci_aer_clear_nonfatal_status(struct pci_dev *dev)
 {
-	int pos;
+	int pos = dev->aer_cap;
 	u32 status, sev;
 
-	pos = dev->aer_cap;
-	if (!pos)
-		return -EIO;
-
 	if (!pcie_aer_is_native(dev))
 		return -EIO;
 
@@ -276,13 +272,9 @@ EXPORT_SYMBOL_GPL(pci_aer_clear_nonfatal_status);
 
 void pci_aer_clear_fatal_status(struct pci_dev *dev)
 {
-	int pos;
+	int pos = dev->aer_cap;
 	u32 status, sev;
 
-	pos = dev->aer_cap;
-	if (!pos)
-		return;
-
 	if (!pcie_aer_is_native(dev))
 		return;