misc: devices: 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

devices/src/pvpanic.rs

@@ -8,6 +8,8 @@ use std::result;
 use std::sync::{Arc, Barrier, Mutex};
 
 use anyhow::anyhow;
+use event_monitor::event;
+use log::{debug, info};
 use pci::{
     BarReprogrammingParams, PCI_CONFIGURATION_ID, PciBarConfiguration, PciBarPrefetchable,
     PciBarRegionType, PciClassCode, PciConfiguration, PciDevice, PciDeviceError, PciHeaderType,