wpa_supplicant: Add 'SCAN TYPE=ONLY' functionality

Usual manual scan request may cause reassociation due to several reasons.
New command is intended to perform pure scan.

Change-Id: I5f517a9f50f286482290e76ca1088abf6a1aeff9
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/wpa_supplicant/wpa_cli.c b/wpa_supplicant/wpa_cli.c
index cc08009..2278138 100644
--- a/wpa_supplicant/wpa_cli.c
+++ b/wpa_supplicant/wpa_cli.c
@@ -1459,6 +1459,8 @@
 
 static int wpa_cli_cmd_scan(struct wpa_ctrl *ctrl, int argc, char *argv[])
 {
+	if (argc > 0)
+		return wpa_cli_cmd(ctrl, "SCAN", 1, argc, argv);
 	return wpa_ctrl_command(ctrl, "SCAN");
 }