e1000: drop lltx, remove unnecessary lock

LLTX is deprecated, don't use it.  This completes the removal of LLTX from
the Intel Network drivers.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/e1000/e1000.h

@@ -182,7 +182,6 @@ struct e1000_tx_ring {
 	/* array of buffer information structs */
 	struct e1000_buffer *buffer_info;
 
-	spinlock_t tx_lock;
 	u16 tdh;
 	u16 tdt;
 	bool last_tx_tso;
@@ -238,7 +237,6 @@ struct e1000_adapter {
 	u16 link_speed;
 	u16 link_duplex;
 	spinlock_t stats_lock;
-	spinlock_t tx_queue_lock;
 	unsigned int total_tx_bytes;
 	unsigned int total_tx_packets;
 	unsigned int total_rx_bytes;