ixgbe: Disable DROP_EN for Rx queues

82599 mistakenly enabled drop on Rx queues in the packet buffer. The
default mode should be store-and-forward from the FIFO.

Signed-off-by: Peter P Waskiewicz Jr <[e-mail]>
Acked-by: Mallikarjuna R Chilakala <[e-mail]>
Signed-off-by: Jeff Kirsher <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ixgbe/ixgbe_main.c

···
 			srrctl |= rx_ring->rx_buf_len >>
 			          IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 	}
-	if (adapter->hw.mac.type == ixgbe_mac_82599EB)
-		srrctl |= IXGBE_SRRCTL_DROP_EN;
 
 	IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
 }