iwlwifi: fix rate control regression

Since driver does not use control.rates[0].count, we have never set that
variable. But currently, after rate control API rewrite, this is required
by mac80211. Otherwise legacy rates control does not work and we transmit
always at 1Mbit/s on pre 11n networks.

[same fix as for iwlegacy, thanks Stanislaw!]
Signed-off-by: Moshe Benji <Moshe.Benji@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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

@@ -2799,7 +2799,7 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
 		info->control.rates[0].flags = 0;
 	}
 	info->control.rates[0].idx = rate_idx;
-
+	info->control.rates[0].count = 1;
 }
 
 static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta,

drivers/net/wireless/iwlwifi/mvm/rs.c

@@ -2546,6 +2546,7 @@ static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
 		info->control.rates[0].flags = 0;
 	}
 	info->control.rates[0].idx = rate_idx;
+	info->control.rates[0].count = 1;
 }
 
 static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,