qcacld-3.0: Fix dead loop in hdd_get_sap_operating_channel

qcacld-2.0 to qcacld-3.0 propagation

In the while loop of hdd_get_sap_operating_channel,
sap_operating_band should be revalued, otherwise it causes
dead loop.

Change-Id: I9cb1ae738066567d032f99621ffe04d3beb74b8c
CRs-Fixed: 1094604

core/hdd/src/wlan_hdd_cfg80211.c

@@ -7283,6 +7283,7 @@ uint8_t hdd_get_sap_operating_band(hdd_context_t *hdd_ctx)
 			sap_operating_band = eCSR_BAND_ALL;
 		status = hdd_get_next_adapter(hdd_ctx, adapter_node,
 				&next);
+		adapter_node = next;
 	}
 	return sap_operating_band;
 }