octeontx2: Fix condition.

Fixes: 93efb0c ("octeontx2-pf: Fix out-of-bounds read in otx2_get_fecparam()")
Signed-off-by: David S. Miller <[email protected]>

Author: davem330

drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c

@@ -964,7 +964,7 @@ static int otx2_get_fecparam(struct net_device *netdev,
 	if (IS_ERR(rsp))
 		return PTR_ERR(rsp);
 
-	if (rsp->fwdata.supported_fec <= FEC_MAX_INDEX) {
+	if (rsp->fwdata.supported_fec < FEC_MAX_INDEX) {
 		if (!rsp->fwdata.supported_fec)
 			fecparam->fec = ETHTOOL_FEC_NONE;
 		else