net: dsa: bcm_sf2: Advertise number of egress queues

The switch supports 8 egress queues per port, so indicate that such that
net/dsa/slave.c::dsa_slave_create can allocate the right number of TX queues.
While at it use SF2_NUM_EGRESS_QUEUE as a define for the number of queues we
support.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/dsa/bcm_sf2.c

@@ -244,7 +244,7 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 	 * to a different queue number
 	 */
 	reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
-	for (i = 0; i < 8; i++)
+	for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++)
 		reg |= i << (PRT_TO_QID_SHIFT * i);
 	core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
 
@@ -1151,6 +1151,9 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev)
 	ds = dev->ds;
 	ds->ops = &bcm_sf2_ops;
 
+	/* Advertise the 8 egress queues */
+	ds->num_tx_queues = SF2_NUM_EGRESS_QUEUES;
+
 	dev_set_drvdata(&pdev->dev, priv);
 
 	spin_lock_init(&priv->indir_lock);

drivers/net/dsa/bcm_sf2_regs.h

@@ -401,4 +401,7 @@ enum bcm_sf2_reg_offs {
 
 #define CFP_NUM_RULES			256
 
+/* Number of egress queues per port */
+#define SF2_NUM_EGRESS_QUEUES		8
+
 #endif /* __BCM_SF2_REGS_H */