fmt code

Author: ZR233

src/pcpu.rs

@@ -1,7 +1,6 @@
 use core::{cell::OnceCell, marker::PhantomData};
 
 use aarch64_cpu::registers::*;
-
 use axerrno::AxResult;
 use axvcpu::{AxArchPerCpu, AxVCpuHal};
 use tock_registers::interfaces::ReadWriteable;