doc/uefi: improve device path documentation

Make the role of the high-level DevicePath wrapper more clear.

Author: phip1611

uefi/src/proto/device_path/mod.rs

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
-//! Helpers to work with UEFI Device Paths and the Device Path Protocol 
-//! 
+//! Helpers to work with UEFI Device Paths and the Device Path Protocol
+//!
 //! The main export of this module is [`DevicePath`].
 //!
 //! A device path is made up of a packed list of variable-length nodes of
@@ -345,7 +345,7 @@ impl ToOwned for DevicePathInstance {
     }
 }
 
-/// Type representing a UEFI device path and also implementing the UEFI 
+/// Type representing a UEFI device path and also implementing the UEFI
 /// protocol.
 ///
 /// A UEFI device path is a structured sequence of binary nodes that describe a