[Fix] Only clear AER errors when AER is available (#3073)

When using the rsu --force option on systems without AER support
the clearing of correctable/uncorrectable errors fails and setpci
command returns exit code 1. Fix this by checking for AER support
before clearing errors.

Signed-off-by: Lars Munch <lmu@silicom.dk>

python/opae.admin/opae/admin/fpga.py

@@ -666,11 +666,17 @@ def clear_device_status(self, device):
         call_process(f'{cmd}={output:08x}')
 
     def clear_uncorrectable_errors(self, device):
+        if not device.supports_ecap('aer'):
+            self.log.debug(f'No AER support in device {device.pci_address}')
+            return
         self.log.debug(f'Clearing uncorrectable errors for {device.pci_address}')
         cmd = f'setpci -s {device.pci_address} ECAP_AER+0x04.L'
         call_process(f'{cmd}=FFFFFFFF')
 
     def clear_correctable_errors(self, device):
+        if not device.supports_ecap('aer'):
+            self.log.debug(f'No AER support in device {device.pci_address}')
+            return
         self.log.debug(f'Clearing correctable errors for {device.pci_address}')
         cmd = f'setpci -s {device.pci_address} ECAP_AER+0x10.L'
         call_process(f'{cmd}=FFFFFFFF')