bnx2x: Added EEE support

This patch adds energy efficient energy support (802.3az) to bnx2x
boards with 84833 phys (and sufficiently new BC and external FW).

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
index 1e2785c..0e8bdcb 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
@@ -785,6 +785,10 @@
 
 	pstats->host_port_stats_counter++;
 
+	if (CHIP_IS_E3(bp))
+		estats->eee_tx_lpi += REG_RD(bp,
+					     MISC_REG_CPMU_LP_SM_ENT_CNT_P0);
+
 	if (!BP_NOMCP(bp)) {
 		u32 nig_timer_max =
 			SHMEM_RD(bp, port_mb[BP_PORT(bp)].stat_nig_timer);