phy: ti: gmii-sel: fix regmap leak on probe failure

The mmio regmap that may be allocated during probe is never freed.

Switch to using the device managed allocator so that the regmap is
released on probe failures (e.g. probe deferral) and on driver unbind.

Fixes: 5ab90f4 ("phy: ti: gmii-sel: Do not use syscon helper to build regmap")
Cc: stable@vger.kernel.org	# 6.14
Cc: Andrew Davis <afd@ti.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Andrew Davis <afd@ti.com>
Link: https://patch.msgid.link/20251127134834.2030-1-johan@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: jhovold

drivers/phy/ti/phy-gmii-sel.c

@@ -512,7 +512,7 @@ static int phy_gmii_sel_probe(struct platform_device *pdev)
 			return dev_err_probe(dev, PTR_ERR(base),
 					     "failed to get base memory resource\n");
 
-		priv->regmap = regmap_init_mmio(dev, base, &phy_gmii_sel_regmap_cfg);
+		priv->regmap = devm_regmap_init_mmio(dev, base, &phy_gmii_sel_regmap_cfg);
 		if (IS_ERR(priv->regmap))
 			return dev_err_probe(dev, PTR_ERR(priv->regmap),
 					     "Failed to get syscon\n");