net: mvpp2: fix validate for PPv2.1

[ Upstream commit 8b318f30ab4ef9bbc1241e6f8c1db366dbd347f2 ]

The Phylink validate function is the Marvell PPv2 driver makes a check
on the GoP id. This is valid an has to be done when using PPv2.2 engines
but makes no sense when using PPv2.1. The check done when using an RGMII
interface makes sure the GoP id is not 0, but this breaks PPv2.1. Fixes
it.

Fixes: 0fb628f0f250 ("net: mvpp2: fix phylink handling of invalid PHY modes")
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c

@@ -4272,7 +4272,7 @@ static void mvpp2_phylink_validate(struct net_device *dev,
 	case PHY_INTERFACE_MODE_RGMII_ID:
 	case PHY_INTERFACE_MODE_RGMII_RXID:
 	case PHY_INTERFACE_MODE_RGMII_TXID:
-		if (port->gop_id == 0)
+		if (port->priv->hw_version == MVPP22 && port->gop_id == 0)
 			goto empty_set;
 		break;
 	default: