net: ag71xx: remove always true branch

The opposite of this condition is checked above and if true, function
returns. Which means this can never be false.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://patch.msgid.link/20240905194938.8453-7-rosenp@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/atheros/ag71xx.c

@@ -719,12 +719,10 @@ static int ag71xx_mdio_probe(struct ag71xx *ag)
 	mii_bus->parent = dev;
 	snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%s.%d", np->name, ag->mac_idx);
 
-	if (!IS_ERR(mdio_reset)) {
-		reset_control_assert(mdio_reset);
-		msleep(100);
-		reset_control_deassert(mdio_reset);
-		msleep(200);
-	}
+	reset_control_assert(mdio_reset);
+	msleep(100);
+	reset_control_deassert(mdio_reset);
+	msleep(200);
 
 	mnp = of_get_child_by_name(np, "mdio");
 	err = devm_of_mdiobus_register(dev, mii_bus, mnp);