bnx2x: Fix PFC setting on BCM57840

This patch handles the second port of a path in a 4-port device of
BCM57840.

Signed-off-by: Yaniv Rosner <yanivr@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_reg.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h
index 44609de..dddbcf6 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h
@@ -2176,6 +2176,7 @@
  * set to 0x345678021. This is a new register (with 2_) added in E3 B0 to
  * accommodate the 9 input clients to ETS arbiter. */
 #define NIG_REG_P0_TX_ARB_PRIORITY_CLIENT2_MSB			 0x18684
+#define NIG_REG_P1_HWPFC_ENABLE					 0x181d0
 #define NIG_REG_P1_MAC_IN_EN					 0x185c0
 /* [RW 1] Output enable for TX MAC interface */
 #define NIG_REG_P1_MAC_OUT_EN					 0x185c4