igb: transition driver to only using advanced descriptors

Currently the driver uses advanced descriptors for its main functionality,
but then uses legacy when testing.  This patch changes this so that
advanced descriptors are used throughout and all mentions of legacy
descriptors are removed.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 23209bd..43f489a 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -994,7 +994,7 @@
 		/* the tx fifo also stores 16 bytes of information about the tx
 		 * but don't include ethernet FCS because hardware appends it */
 		min_tx_space = (adapter->max_frame_size +
-				sizeof(struct e1000_tx_desc) -
+				sizeof(union e1000_adv_tx_desc) -
 				ETH_FCS_LEN) * 2;
 		min_tx_space = ALIGN(min_tx_space, 1024);
 		min_tx_space >>= 10;
@@ -1704,7 +1704,7 @@
 	memset(tx_ring->buffer_info, 0, size);
 
 	/* round up to nearest 4K */
-	tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
+	tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
 	tx_ring->size = ALIGN(tx_ring->size, 4096);
 
 	tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
@@ -1773,7 +1773,7 @@
 		struct igb_ring *ring = &adapter->tx_ring[i];
 		j = ring->reg_idx;
 		wr32(E1000_TDLEN(j),
-		     ring->count * sizeof(struct e1000_tx_desc));
+		     ring->count * sizeof(union e1000_adv_tx_desc));
 		tdba = ring->dma;
 		wr32(E1000_TDBAL(j),
 		     tdba & 0x00000000ffffffffULL);