fs: make generic and extended attrs independent of each other

internal/fs/node_aix.go

@@ -21,6 +21,6 @@ func nodeRestoreGenericAttributes(node *restic.Node, _ string, warn func(msg str
 }
 
 // nodeFillGenericAttributes is a no-op on AIX.
-func nodeFillGenericAttributes(_ *restic.Node, _ string, _ *ExtendedFileInfo) (allowExtended bool, err error) {
-	return true, nil
+func nodeFillGenericAttributes(_ *restic.Node, _ string, _ *ExtendedFileInfo) error {
+	return nil
 }