Disable atdf2svd CLI dependencies

Disable default features of atdf2svd to disable the `cli` feature which
pulls in all the dependencies for the CLI of the tool.  This helps with
reducing the amount of dependencies we carry at build-time.

Author: Rahix

Cargo.toml

@@ -109,7 +109,7 @@ optional = true
 [build-dependencies]
 svd2rust = "=0.36.1"
 svdtools = "=0.4.6"
-atdf2svd = "=0.5.1"
+atdf2svd = { version = "=0.5.1", default-features = false }
 prettyplease = "=0.2.32"
 svd-rs = "=0.14.12"
 yaml-rust2 = "=0.10.1"