iwlwifi: fix the basic CCK rates calculation

Fix a copy paste error in iwl_calc_basic_rates which leads
to a wrong calculation of CCK basic rates.

Cc: stable@vger.kernel.org
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

drivers/net/wireless/iwlwifi/dvm/rxon.c

@@ -1012,12 +1012,12 @@ static void iwl_calc_basic_rates(struct iwl_priv *priv,
 	 * As a consequence, it's not as complicated as it sounds, just add
 	 * any lower rates to the ACK rate bitmap.
 	 */
-	if (IWL_RATE_11M_INDEX < lowest_present_ofdm)
-		ofdm |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
-	if (IWL_RATE_5M_INDEX < lowest_present_ofdm)
-		ofdm |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
-	if (IWL_RATE_2M_INDEX < lowest_present_ofdm)
-		ofdm |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
+	if (IWL_RATE_11M_INDEX < lowest_present_cck)
+		cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
+	if (IWL_RATE_5M_INDEX < lowest_present_cck)
+		cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
+	if (IWL_RATE_2M_INDEX < lowest_present_cck)
+		cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
 	/* 1M already there or needed so always add */
 	cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;