bnx2x: downgrade Max BW error message to debug

There are valid configurations where Max BW is configured to zero for
some VNs.
Print the message only if debugging is enabled and do not call the
configuration "illegal".

[v2: use DP(), not BNX2X_DBG_ERR(); recommended by Eilon Greenstein.]
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h

@@ -1481,8 +1481,8 @@ static inline u16 bnx2x_extract_max_cfg(struct bnx2x *bp, u32 mf_cfg)
 	u16 max_cfg = (mf_cfg & FUNC_MF_CFG_MAX_BW_MASK) >>
 			      FUNC_MF_CFG_MAX_BW_SHIFT;
 	if (!max_cfg) {
-		BNX2X_ERR("Illegal configuration detected for Max BW - "
-			  "using 100 instead\n");
+		DP(NETIF_MSG_LINK,
+		   "Max BW configured to 0 - using 100 instead\n");
 		max_cfg = 100;
 	}
 	return max_cfg;