rust: pci: use "kernel vertical" style for imports

Convert all imports in the PCI Rust module to use "kernel vertical"
style.

With this subsequent patches neither introduce unrelated changes nor
leave an inconsistent import pattern.

While at it, drop unnecessary imports covered by prelude::*.

Link: https://docs.kernel.org/rust/coding-guidelines.html#imports
Reviewed-by: Zhi Wang <zhiw@nvidia.com>
Link: https://patch.msgid.link/20251105120352.77603-1-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

rust/kernel/pci.rs

@@ -5,27 +5,46 @@
 //! C header: [`include/linux/pci.h`](srctree/include/linux/pci.h)
 
 use crate::{
-    bindings, container_of, device,
-    device_id::{RawDeviceId, RawDeviceIdIndex},
+    bindings,
+    container_of,
+    device,
+    device_id::{
+        RawDeviceId,
+        RawDeviceIdIndex, //
+    },
     driver,
-    error::{from_result, to_result, Result},
+    error::{
+        from_result,
+        to_result, //
+    },
+    prelude::*,
     str::CStr,
     types::Opaque,
-    ThisModule,
+    ThisModule, //
 };
 use core::{
     marker::PhantomData,
-    ptr::{addr_of_mut, NonNull},
+    ptr::{
+        addr_of_mut,
+        NonNull, //
+    },
 };
-use kernel::prelude::*;
 
 mod id;
 mod io;
 mod irq;
 
-pub use self::id::{Class, ClassMask, Vendor};
+pub use self::id::{
+    Class,
+    ClassMask,
+    Vendor, //
+};
 pub use self::io::Bar;
-pub use self::irq::{IrqType, IrqTypes, IrqVector};
+pub use self::irq::{
+    IrqType,
+    IrqTypes,
+    IrqVector, //
+};
 
 /// An adapter for the registration of PCI drivers.
 pub struct Adapter<T: Driver>(T);

rust/kernel/pci/id.rs

@@ -4,7 +4,10 @@
 //!
 //! This module contains PCI class codes, Vendor IDs, and supporting types.
 
-use crate::{bindings, error::code::EINVAL, error::Error, prelude::*};
+use crate::{
+    bindings,
+    prelude::*, //
+};
 use core::fmt;
 
 /// PCI device class codes.

rust/kernel/pci/io.rs

@@ -4,14 +4,17 @@
 
 use super::Device;
 use crate::{
-    bindings, device,
+    bindings,
+    device,
     devres::Devres,
-    io::{Io, IoRaw},
-    str::CStr,
-    sync::aref::ARef,
+    io::{
+        Io,
+        IoRaw, //
+    },
+    prelude::*,
+    sync::aref::ARef, //
 };
 use core::ops::Deref;
-use kernel::prelude::*;
 
 /// A PCI BAR to perform I/O-Operations on.
 ///

rust/kernel/pci/irq.rs

@@ -4,16 +4,20 @@
 
 use super::Device;
 use crate::{
-    bindings, device,
+    bindings,
+    device,
     device::Bound,
     devres,
-    error::{to_result, Result},
-    irq::{self, IrqRequest},
+    error::to_result,
+    irq::{
+        self,
+        IrqRequest, //
+    },
+    prelude::*,
     str::CStr,
-    sync::aref::ARef,
+    sync::aref::ARef, //
 };
 use core::ops::RangeInclusive;
-use kernel::prelude::*;
 
 /// IRQ type flags for PCI interrupt allocation.
 #[derive(Debug, Clone, Copy)]