Map system76/addw2 EC code

Author: jackpot51

src/app/ec.rs

@@ -139,6 +139,7 @@ impl EcComponent {
                 "L140CU" => "system76/lemp9".to_string(),
                 "N130ZU" => "system76/galp3-c".to_string(),
                 "N140CU" => "system76/galp3-c".to_string(),
+                "PBx0Dx2" => "system76/addw2".to_string(),
                 _ => model.to_string(),
             }
         };