Convert all imports in the rust_driver_pci to use "kernel vertical" style.

Signed-off-by: Zhi Wang <zhiw@nvidia.com>
---
 samples/rust/rust_driver_pci.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 5823787bea8e..ee6248b8cda5 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -4,7 +4,14 @@
 //!
 //! To make this driver probe, QEMU must be run with `-device pci-testdev`.
 
-use kernel::{c_str, device::Core, devres::Devres, pci, prelude::*, sync::aref::ARef};
+use kernel::{
+    c_str,
+    device::Core,
+    devres::Devres,
+    pci,
+    prelude::*,
+    sync::aref::ARef, //
+};
 
 struct Regs;
 
-- 
2.51.0