qcacld-3.0: Fix SAP stop fail while detect radar in cac wait state

If radar detected while in SAP CAC wait state, and stop AP command
invoke at same time, SAP machine will go to eSAP_DISCONNECTING but
ignore eSAP_HDD_STOP_INFRA_BSS message in sap_fsm_state_disconnecting()
because is_chan_change_inprogress is not set for this case.

Set is_chan_change_inprogress as case radar detected after cac
wait time.

Change-Id: I156cf8375520eeb258d5cde53bd13e80881a36a3
CRs-Fixed: 2273169

core/sap/src/sap_fsm.c

@@ -2439,6 +2439,7 @@ static QDF_STATUS sap_fsm_state_dfs_cac_wait(struct sap_context *sap_ctx,
 					continue;
 				/* SAP to be moved to DISCONNECTING state */
 				t_sap_ctx->sapsMachine = eSAP_DISCONNECTING;
+				t_sap_ctx->is_chan_change_inprogress = true;
 				/*
 				 * eSAP_DFS_CHANNEL_CAC_RADAR_FOUND:
 				 * A Radar is found on current DFS Channel