iwlagn: Remove un-necessary indirect call

After driver split, no need to make indirect call to txfifo flush function

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 5f335c7..6f9ebae 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -2493,7 +2493,7 @@
 	if (iwl_is_rfkill(priv))
 		return -EFAULT;
 
-	priv->cfg->ops->lib->dev_txfifo_flush(priv, IWL_DROP_ALL);
+	iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 
 	return count;
 }
@@ -2693,8 +2693,7 @@
 	DEBUGFS_ADD_FILE(ucode_rx_stats, dir_debug, S_IRUSR);
 	DEBUGFS_ADD_FILE(ucode_tx_stats, dir_debug, S_IRUSR);
 	DEBUGFS_ADD_FILE(ucode_general_stats, dir_debug, S_IRUSR);
-	if (priv->cfg->ops->lib->dev_txfifo_flush)
-		DEBUGFS_ADD_FILE(txfifo_flush, dir_debug, S_IWUSR);
+	DEBUGFS_ADD_FILE(txfifo_flush, dir_debug, S_IWUSR);
 	DEBUGFS_ADD_FILE(protection_mode, dir_debug, S_IWUSR | S_IRUSR);
 
 	DEBUGFS_ADD_FILE(sensitivity, dir_debug, S_IRUSR);