iwlwifi: fix compile error when CONFIG_MAC80211_DEBUGFS is not selected

Make iwl4965_lq_sta->drv available even without CONFIG_MAC80211_DEBUGFS.

Signed-off-by: Yi Zhu <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
index b608e1c..c9847b1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
@@ -163,8 +163,8 @@
 	struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
 #endif
 	struct iwl4965_rate dbg_fixed;
-	struct iwl_priv *drv;
 #endif
+	struct iwl_priv *drv;
 };
 
 static void rs_rate_scale_perform(struct iwl_priv *priv,