Add genphy_config_aneg() method to phy::Device, wrapping the C
function __genphy_config_aneg(). This is needed by PHY drivers that
perform custom BMCR configuration before calling the generic
auto-negotiation setup.

The wrapper calls __genphy_config_aneg(phydev, false) directly since
genphy_config_aneg() is a static inline function not visible to
bindgen.

Signed-off-by: Artem Lytkin <iprintercanon@gmail.com>
---
 rust/kernel/net/phy.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs
index b86939b163e3..01597f2616fd 100644
--- a/rust/kernel/net/phy.rs
+++ b/rust/kernel/net/phy.rs
@@ -284,6 +284,15 @@ pub fn genphy_read_abilities(&mut self) -> Result {
         // So it's just an FFI call.
         to_result(unsafe { bindings::genphy_read_abilities(phydev) })
     }
+
+    /// Configures the advertisement and resets auto-negotiation
+    /// if auto-negotiation is enabled.
+    pub fn genphy_config_aneg(&mut self) -> Result {
+        let phydev = self.0.get();
+        // SAFETY: `phydev` is pointing to a valid object by the type invariant of `Self`.
+        // So it's just an FFI call.
+        to_result(unsafe { bindings::__genphy_config_aneg(phydev, false) })
+    }
 }
 
 impl AsRef<kernel::device::Device> for Device {
-- 
2.43.0