Add 'get_capability channels' command

Change-Id: Ic5d5769b80804d3e8b577e988a1caf1e149b8c01
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/wpa_supplicant/wpa_cli.c b/wpa_supplicant/wpa_cli.c
index 4685970..8abf2ae 100644
--- a/wpa_supplicant/wpa_cli.c
+++ b/wpa_supplicant/wpa_cli.c
@@ -2849,7 +2849,8 @@
 	  "<<idx> | <bssid>> = get detailed scan result info" },
 	{ "get_capability", wpa_cli_cmd_get_capability,
 	  cli_cmd_flag_none,
-	  "<eap/pairwise/group/key_mgmt/proto/auth_alg> = get capabilies" },
+	  "<eap/pairwise/group/key_mgmt/proto/auth_alg/channels>\n"
+	  "  = get capabilities" },
 	{ "reconfigure", wpa_cli_cmd_reconfigure,
 	  cli_cmd_flag_none,
 	  "= force wpa_supplicant to re-read its configuration file" },