nl80211: Add set/get for frag/rts threshold and retry limits

Add new nl80211 attributes that can be used with NL80211_CMD_SET_WIPHY
and NL80211_CMD_GET_WIPHY to manage fragmentation/RTS threshold and
retry limits.

Since these values are stored in struct wiphy, remove the local copy
from mac80211 where feasible (frag & rts threshold). The retry limits
are currently needed in struct ieee80211_conf, but these could be
eventually removed since the driver should have access to the values
in struct wiphy.

Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 210b9b6..5001328 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -52,13 +52,13 @@
 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
 		      local->hw.conf.channel->center_freq);
 DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
-		      local->rts_threshold);
+		      local->hw.wiphy->rts_threshold);
 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
-		      local->fragmentation_threshold);
+		      local->hw.wiphy->frag_threshold);
 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
-		      local->hw.conf.short_frame_max_tx_count);
+		      local->hw.wiphy->retry_short);
 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
-		      local->hw.conf.long_frame_max_tx_count);
+		      local->hw.wiphy->retry_long);
 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
 		      local->total_ps_buffered);
 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",