misc: pci: drop extern crate, use modern rust

This commit is part of a series of similar commits.

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com

pci/src/lib.rs

@@ -5,8 +5,6 @@
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
 //! Implements pci devices and busses.
-#[macro_use]
-extern crate log;
 
 mod bus;
 mod configuration;