Apply Pedantic Clippy Lints

embassy-usb/src/control.rs

@@ -120,7 +120,7 @@ impl Request {
     }
 
     /// Gets the descriptor type and index from the value field of a GET_DESCRIPTOR request.
-    pub fn descriptor_type_index(&self) -> (u8, u8) {
+    pub const fn descriptor_type_index(&self) -> (u8, u8) {
         ((self.value >> 8) as u8, self.value as u8)
     }
 }