qcacmn: Fix memory allocation latency in beacon process

Currently if the number of APs in the STA environment
are many, then the STA will receive many beacons, whose
beacon process path can take long time, in the kernel
work queue, hence the other processes have to wait
for them to complete, and may get timeout, if the
the time to process the beaocns is larger than their
process timeout.

Fix is to :-
1. Add rate limit to failure conditions of memory
not allocated
2. Make memory allocation in path of beacon process
atomic.

Change-Id: I0b15fd4924bb7d696a33adeb1875f1f9c277db18
CRs-Fixed: 2360624

umac/scan/dispatcher/src/wlan_scan_tgt_api.c

@@ -272,14 +272,14 @@ QDF_STATUS tgt_scan_bcn_probe_rx_callback(struct wlan_objmgr_psoc *psoc,
 	bcn = qdf_mem_malloc_atomic(sizeof(*bcn));
 
 	if (!bcn) {
-		scm_err("Failed to allocate memory for bcn");
+		scm_debug_rl("Failed to allocate memory for bcn");
 		status = QDF_STATUS_E_NOMEM;
 		goto free;
 	}
 	bcn->rx_data =
 		qdf_mem_malloc_atomic(sizeof(*rx_param));
 	if (!bcn->rx_data) {
-		scm_err("Failed to allocate memory for rx_data");
+		scm_debug_rl("Failed to allocate memory for rx_data");
 		status = QDF_STATUS_E_NOMEM;
 		goto free;
 	}