net: phy: microchip: lan87xx: reinit PHY after cable test

[ Upstream commit 30f747b8d53bc73555f268d0f48f56174fa5bf10 ]

Reinit PHY after cable test, otherwise link can't be established on
tested port. This issue is reproducible on LAN9372 switches with
integrated 100BaseT1 PHYs.

Fixes: 7880502 ("net: phy: microchip_t1: add cable test support for lan87xx phy")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20240705084954.83048-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 0370f66700104dc495196d3be18481f6c3d0b53d)

drivers/net/phy/microchip_t1.c

@@ -748,7 +748,7 @@ static int lan87xx_cable_test_report(struct phy_device *phydev)
 	ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
 				lan87xx_cable_test_report_trans(detect));
 
-	return 0;
+	return phy_init_hw(phydev);
 }
 
 static int lan87xx_cable_test_get_status(struct phy_device *phydev,