iwlwifi: configure uCode to use open loop tx power algorithm

This patch configures uCode to use open loop tx power algorithm
via TX_POWER_DBM (0x98) host command.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-5000.c

@@ -1426,7 +1426,7 @@ static int  iwl5000_send_tx_power(struct iwl_priv *priv)
 
 	/* half dBm need to multiply */
 	tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
-	tx_power_cmd.flags = 0;
+	tx_power_cmd.flags = IWL50_TX_POWER_NO_CLOSED;
 	tx_power_cmd.srv_chan_lmt = IWL50_TX_POWER_AUTO;
 	return  iwl_send_cmd_pdu_async(priv, REPLY_TX_POWER_DBM_CMD,
 				       sizeof(tx_power_cmd), &tx_power_cmd,

drivers/net/wireless/iwlwifi/iwl-commands.h

@@ -336,6 +336,8 @@ struct iwl4965_tx_power_db {
  * struct iwl5000_tx_power_dbm_cmd
  */
 #define IWL50_TX_POWER_AUTO 0x7f
+#define IWL50_TX_POWER_NO_CLOSED (0x1 << 6)
+
 struct iwl5000_tx_power_dbm_cmd {
 	s8 global_lmt; /*in half-dBm (e.g. 30 = 15 dBm) */
 	u8 flags;