rust: i2c: Update ARef and AlwaysRefCounted imports to use sync::aref

Update call sites in `i2c.rs` to import `ARef` and
`AlwaysRefCounted` from `sync::aref` instead of `types`.

This aligns with the ongoing effort to move `ARef` and
`AlwaysRefCounted` to sync.

Suggested-by: Benno Lossin <lossin@kernel.org>
Link: #1173
Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com>
Acked-by: Igor Korotin <igor.korotin.linux@gmail.com>
Link: https://patch.msgid.link/20260102202714.184223-3-shankari.ak0208@gmail.com
[ Move `ARef` import into the `kernel` `use` tree above. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: Shankari02

rust/kernel/i2c.rs

@@ -16,10 +16,11 @@ use crate::{
     error::*,
     of,
     prelude::*,
-    types::{
-        AlwaysRefCounted,
-        Opaque, //
-    }, //
+    sync::aref::{
+        ARef,
+        AlwaysRefCounted, //
+    },
+    types::Opaque, //
 };
 
 use core::{
@@ -31,8 +32,6 @@ use core::{
     }, //
 };
 
-use kernel::types::ARef;
-
 /// An I2C device id table.
 #[repr(transparent)]
 #[derive(Clone, Copy)]
@@ -416,7 +415,7 @@ kernel::impl_device_context_deref!(unsafe { I2cAdapter });
 kernel::impl_device_context_into_aref!(I2cAdapter);
 
 // SAFETY: Instances of `I2cAdapter` are always reference-counted.
-unsafe impl crate::types::AlwaysRefCounted for I2cAdapter {
+unsafe impl AlwaysRefCounted for I2cAdapter {
     fn inc_ref(&self) {
         // SAFETY: The existence of a shared reference guarantees that the refcount is non-zero.
         unsafe { bindings::i2c_get_adapter(self.index()) };