mac80211: rename csa counters to countdown counters

We want to reuse the functions and structs for other counters such as BSS
color change. Rename them to more generic names.

Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/20200811080107.3615705-2-john@phrozen.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/ibss.c

@@ -145,9 +145,9 @@ ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata,
 		*pos++ = csa_settings->block_tx ? 1 : 0;
 		*pos++ = ieee80211_frequency_to_channel(
 				csa_settings->chandef.chan->center_freq);
-		presp->csa_counter_offsets[0] = (pos - presp->head);
+		presp->cntdwn_counter_offsets[0] = (pos - presp->head);
 		*pos++ = csa_settings->count;
-		presp->csa_current_counter = csa_settings->count;
+		presp->cntdwn_current_counter = csa_settings->count;
 	}
 
 	/* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */