wil6210: fix false "scan timeout"

When sending scan request, if hardware is not ready, scan timer was started
and scan timeout mis-reported.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/wil6210/cfg80211.c b/drivers/net/wireless/ath/wil6210/cfg80211.c
index ee8a0e5..a00f318 100644
--- a/drivers/net/wireless/ath/wil6210/cfg80211.c
+++ b/drivers/net/wireless/ath/wil6210/cfg80211.c
@@ -311,8 +311,10 @@
 	rc = wmi_send(wil, WMI_START_SCAN_CMDID, &cmd, sizeof(cmd.cmd) +
 			cmd.cmd.num_channels * sizeof(cmd.cmd.channel_list[0]));
 
-	if (rc)
+	if (rc) {
+		del_timer_sync(&wil->scan_timer);
 		wil->scan_request = NULL;
+	}
 
 	return rc;
 }