iwlagn: prepare for multi-TB commands

In a subsequent patch, I want to make commands use
multiple TBs in a TFD. This is a simple change to
prepare the data structures for this, with as of
now still just a single TB supported.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-6000.c

@@ -221,9 +221,9 @@ static int iwl6000_hw_channel_switch(struct iwl_priv *priv,
 	struct ieee80211_vif *vif = ctx->vif;
 	struct iwl_host_cmd hcmd = {
 		.id = REPLY_CHANNEL_SWITCH,
-		.len = sizeof(cmd),
+		.len = { sizeof(cmd), },
 		.flags = CMD_SYNC,
-		.data = &cmd,
+		.data = { &cmd, },
 	};
 
 	cmd.band = priv->band == IEEE80211_BAND_2GHZ;