iwl3945: Use iwl-hcmd host command routines

With the previously added tfd related ops, we can now use the iwl-tx.c host
command enqueue routine. Since the 3945 host command specific
routines are identical to the agn ones, we can just remove them from the 3945
code.

Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 487a1d6..1a2cfbe 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -1004,7 +1004,8 @@
 	phys_addr += offsetof(struct iwl_cmd, hdr);
 
 	priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
-						   phys_addr, fix_size, 1, 0);
+						   phys_addr, fix_size, 1,
+						   U32_PAD(cmd->len));
 
 #ifdef CONFIG_IWLWIFI_DEBUG
 	switch (out_cmd->hdr.cmd) {
@@ -1028,8 +1029,9 @@
 #endif
 	txq->need_update = 1;
 
-	/* Set up entry in queue's byte count circular buffer */
-	priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
+	if (priv->cfg->ops->lib->txq_update_byte_cnt_tbl)
+		/* Set up entry in queue's byte count circular buffer */
+		priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 
 	/* Increment and update queue's write index */
 	q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);