[net] net: stmmac: power up/down serdes in stmmac_open/release

[Jakub Kicinski]

On Fri, 23 Sep 2022 08:50:13 +0800 Junxiao Chang wrote:
> -
> -		if (ret < 0)
> -			goto error_serdes_powerup;
> -	}

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:7322:1: warning: unused label 'error_serdes_powerup' [-Wunused-label]
error_serdes_powerup:
^~~~~~~~~~~~~~~~~~~~~