rt2x00: Rename config_preamble() to config_erp()

Rename config_preamble() to config_erp() and cleanup argument
list by putting it all into a single structure.
This will make the function more meaningful and easier to
expand later. This second option is mostly intended to make
the patch "mac80211: proper short-slot handling" from Johannes Berg
easier to apply for rt2x00.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h
index 34ccb3d..6bd5a01 100644
--- a/drivers/net/wireless/rt2x00/rt2x00lib.h
+++ b/drivers/net/wireless/rt2x00/rt2x00lib.h
@@ -100,9 +100,9 @@
 			   struct rt2x00_intf *intf,
 			   enum ieee80211_if_types type,
 			   u8 *mac, u8 *bssid);
-void rt2x00lib_config_preamble(struct rt2x00_dev *rt2x00dev,
-			       struct rt2x00_intf *intf,
-			       const unsigned int short_preamble);
+void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
+			  struct rt2x00_intf *intf,
+			  struct ieee80211_bss_conf *conf);
 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 			      enum antenna rx, enum antenna tx);
 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,