use enumeratedValues to generate the API

Author: Jorge Aparicio

Cargo.lock

@@ -14,5 +14,8 @@ clap = "2.14.0"
 either = "1.0.2"
 inflections = "1.0.0"
 quote = "0.3.3"
-svd-parser = "0.2.0"
 syn = "0.9"
+
+[dependencies.svd-parser]
+branch = "enumerated-values"
+git = "https://github.com/japaric/svd"