phy: micrel: ksz90x1: Issue PHY soft reset during configuration

- Add a call to phy_reset() in ksz9031_config() to ensure the PHY is
  properly reset during initialization.
- This clears the power-down bit and ensures the PHY recovers correctly
  after Linux reboot.

Tested on Agilex5 hardware with KSZ90X1 PHY.

Signed-off-by: Boon Khai Ng <boon.khai.ng@altera.com>

drivers/net/phy/micrel_ksz90x1.c

@@ -407,6 +407,9 @@ static int ksz9031_config(struct phy_device *phydev)
 	if (ret)
 		return ret;
 
+	/* soft reset */
+	phy_reset(phydev);
+
 	ksz90x1_workaround_asymmetric_pause(phydev);
 
 	/* add an option to disable the gigabit feature of this PHY */