iwlagn: remove the indirection for the dma channel num

Not needed since the driver split.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.c b/drivers/net/wireless/iwlwifi/iwl-trans.c
index 5c5a489..0c92456 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.c
@@ -529,7 +529,7 @@
 	iwlagn_txq_set_sched(priv, 0);
 
 	/* Stop each Tx DMA channel, and wait for it to be idle */
-	for (ch = 0; ch < priv->hw_params.dma_chnl_num; ch++) {
+	for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) {
 		iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
 		if (iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG,
 				    FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),