bnx2: Adjust flow control water marks.

The current water marks are too high and can cause unnecessary flow
control frames.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index b860fbb..cd4b0e4 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -349,7 +349,7 @@
 #define BNX2_L2CTX_BD_PRE_READ				0x00000000
 #define BNX2_L2CTX_CTX_SIZE				0x00000000
 #define BNX2_L2CTX_CTX_TYPE				0x00000000
-#define BNX2_L2CTX_LO_WATER_MARK_DEFAULT		 32
+#define BNX2_L2CTX_LO_WATER_MARK_DEFAULT		 4
 #define BNX2_L2CTX_LO_WATER_MARK_SCALE			 4
 #define BNX2_L2CTX_LO_WATER_MARK_DIS			 0
 #define BNX2_L2CTX_HI_WATER_MARK_SHIFT			 4