wl12xx: set max_sched_scan_ie_len correctly

The wiphy max_sched_scan_ie_len attribute was not set correctly and
remained as 0, so when IEs were being passed in a scheduled scan, we
were returning -EINVAL.

Fix this by setting the attribute properly.
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/main.c

@@ -4679,6 +4679,9 @@ int wl1271_init_ieee80211(struct wl1271 *wl)
 	wl->hw->wiphy->max_scan_ie_len = WL1271_CMD_TEMPL_DFLT_SIZE -
 			sizeof(struct ieee80211_header);
 
+	wl->hw->wiphy->max_sched_scan_ie_len = WL1271_CMD_TEMPL_DFLT_SIZE -
+		sizeof(struct ieee80211_header);
+
 	wl->hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 
 	/* make sure all our channels fit in the scanned_ch bitmask */