usb: split driver trait to separate crate.

embassy-usb/src/control.rs

@@ -1,7 +1,8 @@
 //! USB control data types.
 use core::mem;
 
-use super::types::*;
+use crate::driver::Direction;
+use crate::types::StringIndex;
 
 /// Control request type.
 #[repr(u8)]
@@ -42,7 +43,7 @@ pub enum Recipient {
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct Request {
     /// Direction of the request.
-    pub direction: UsbDirection,
+    pub direction: Direction,
     /// Type of the request.
     pub request_type: RequestType,
     /// Recipient of the request.