bnxt_en: Re-factor bnxt_setup_tc().

Add a new function bnxt_setup_mq_tc() to handle MQPRIO.  This new function
will be called during ETS setup when we add DCBNL in the next patch.
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -6337,17 +6337,10 @@ static int bnxt_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
-static int bnxt_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
-			 struct tc_to_netdev *ntc)
+int bnxt_setup_mq_tc(struct net_device *dev, u8 tc)
 {
 	struct bnxt *bp = netdev_priv(dev);
 	bool sh = false;
-	u8 tc;
-
-	if (ntc->type != TC_SETUP_MQPRIO)
-		return -EINVAL;
-
-	tc = ntc->tc;
 
 	if (tc > bp->max_tc) {
 		netdev_err(dev, "too many traffic classes requested: %d Max supported is %d\n",
@@ -6390,6 +6383,15 @@ static int bnxt_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
 	return 0;
 }
 
+static int bnxt_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
+			 struct tc_to_netdev *ntc)
+{
+	if (ntc->type != TC_SETUP_MQPRIO)
+		return -EINVAL;
+
+	return bnxt_setup_mq_tc(dev, ntc->tc);
+}
+
 #ifdef CONFIG_RFS_ACCEL
 static bool bnxt_fltr_match(struct bnxt_ntuple_filter *f1,
 			    struct bnxt_ntuple_filter *f2)

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -1225,5 +1225,6 @@ int bnxt_hwrm_set_link_setting(struct bnxt *, bool, bool);
 int bnxt_hwrm_fw_set_time(struct bnxt *);
 int bnxt_open_nic(struct bnxt *, bool, bool);
 int bnxt_close_nic(struct bnxt *, bool, bool);
+int bnxt_setup_mq_tc(struct net_device *dev, u8 tc);
 int bnxt_get_max_rings(struct bnxt *, int *, int *, bool);
 #endif