qcacld-3.0: set ipa perf level when stop bus_bw timer

qcacld-2.0 to qcacld-3.0 propagation

IPA perf level is updated in bus_bw timer which is triggered periodly.
If do not reset the IPA perf level when this timer stopping, the ipa
perf level could be remained in a invalid state.

Change-Id: Ia817c80176790ac5f2c3e474616163fef2de38b8
CRs-Fixed: 1077401

core/hdd/src/wlan_hdd_main.c

@@ -8787,6 +8787,8 @@ void hdd_stop_bus_bw_compute_timer(hdd_adapter_t *adapter)
 	}
 
 	if (can_stop == true) {
+		/* reset the ipa perf level */
+		hdd_ipa_set_perf_level(hdd_ctx, 0, 0);
 		qdf_mc_timer_stop(&hdd_ctx->bus_bw_timer);
 		hdd_reset_tcp_delack(hdd_ctx);
 	}