Minor beautification

Cargo.toml

@@ -29,7 +29,7 @@ embedded-io = "0.6.1"
 # TODO: remove once unnecessary.
 ral-registers = "0.1.2"
 eh-old = { package = "embedded-hal", version = "0.2.6" }
-bitflags = "1.3"
+bitflags-old = { package = "bitflags", version = "1.3" }
 
 [dev-dependencies]
 teensy4-bsp = { version = "0.5.0", features = ["rt"] }