ixgbe: DCB 82598 devices, tx_idx and rx_idx swapped

The tx_idx and rx_idx values are swapped on 82598 devices
with DCB enabled.
Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com>
Tested-by: NRoss Brattain <ross.b.brattain@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ixgbe/ixgbe_main.c

@@ -4636,8 +4636,8 @@ static void ixgbe_get_first_reg_idx(struct ixgbe_adapter *adapter, u8 tc,
 
 	switch (hw->mac.type) {
 	case ixgbe_mac_82598EB:
-		*tx = tc << 3;
-		*rx = tc << 2;
+		*tx = tc << 2;
+		*rx = tc << 3;
 		break;
 	case ixgbe_mac_82599EB:
 	case ixgbe_mac_X540: