net: mvpp2: adapt mvpp2_defaults_set() to PPv2.2

This commit modifies the mvpp2_defaults_set() function to not do the
loopback and FIFO threshold initialization, which are not needed for
PPv2.2.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/mvpp2.c

@@ -4157,6 +4157,7 @@ static void mvpp2_defaults_set(struct mvpp2_port *port)
 {
 	int tx_port_num, val, queue, ptxq, lrxq;
 
+	if (port->priv->hw_version == MVPP21) {
 		/* Configure port to loopback if needed */
 		if (port->flags & MVPP2_F_LOOPBACK)
 			mvpp2_port_loopback_set(port);
@@ -4167,6 +4168,7 @@ static void mvpp2_defaults_set(struct mvpp2_port *port)
 		/* Min. TX threshold must be less than minimal packet length */
 		val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2);
 		writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
+	}
 
 	/* Disable Legacy WRR, Disable EJP, Release from reset */
 	tx_port_num = mvpp2_egress_port(port);