iw: add channel command name

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
diff --git a/util.c b/util.c
index 42c992d..0c6d978 100644
--- a/util.c
+++ b/util.c
@@ -165,6 +165,7 @@
 	[NL80211_CMD_SET_TX_BITRATE_MASK] = "set_tx_bitrate_mask",
 	[NL80211_CMD_REGISTER_ACTION] = "register_action",
 	[NL80211_CMD_ACTION] = "action",
+	[NL80211_CMD_SET_CHANNEL] = "set_channel",
 };
 
 static char cmdbuf[100];