Fix no-NEED_AP_MLME build

Commit 34445d12eeb2eea53f50e5021e260dc0d07cbbbd forgot to convert
the hostapd_prepare_rates() inline wrapper for builds that do not
define NEED_AP_MLME.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/ap/hw_features.h

@@ -60,7 +60,7 @@ static inline int hostapd_check_ht_capab(struct hostapd_iface *iface)
 	return 0;
 }
 
-static inline int hostapd_prepare_rates(struct hostapd_data *hapd,
+static inline int hostapd_prepare_rates(struct hostapd_iface *iface,
 					struct hostapd_hw_modes *mode)
 {
 	return 0;