qcacmn: Add NULL pointer check for KW issues

Add NULL pointer check in function hif_send_single() and
htc_dump_counter_info() for KW issues.

Change-Id: I4b020c566b14b28a825c13752dccf67b5f8bb837
CRs-Fixed: 2675205

htc/htc_send.c

@@ -69,6 +69,9 @@ void htc_dump_counter_info(HTC_HANDLE HTCHandle)
 {
 	HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle);
 
+	if (!target)
+		return;
+
 	AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
 			("\n%s: ce_send_cnt = %d, TX_comp_cnt = %d\n",
 			 __func__, target->ce_send_cnt, target->TX_comp_cnt));