qcacmn: Initialized the defined arrays to NULL

Arrays are not initialize and due to which
elements in array might be used uninitialized.
To avoid this case, arrays are initialized to NULL.

Change-Id: Ib83c8f512369f877b9c39d9e6eb431e9bdca7ad9
CRs-Fixed: 3449024

dp/wifi3.0/dp_stats.c

@@ -4312,7 +4312,7 @@ dp_print_rx_soc_fw_refill_ring_num_rxdma_err_tlv(uint32_t *tag_buf)
 
 	uint8_t i;
 	uint16_t index = 0;
-	char rxdma_err_cnt[DP_MAX_STRING_LEN];
+	char rxdma_err_cnt[DP_MAX_STRING_LEN] = {'\0'};
 	uint32_t tag_len = (HTT_STATS_TLV_LENGTH_GET(*tag_buf) >> 2);
 	uint64_t total_rxdma_err_cnt = 0;
 
@@ -4347,7 +4347,7 @@ static void dp_print_rx_soc_fw_refill_ring_num_reo_err_tlv(uint32_t *tag_buf)
 
 	uint8_t i;
 	uint16_t index = 0;
-	char reo_err_cnt[DP_MAX_STRING_LEN];
+	char reo_err_cnt[DP_MAX_STRING_LEN] = {'\0'};
 	uint32_t tag_len = (HTT_STATS_TLV_LENGTH_GET(*tag_buf) >> 2);
 
 	tag_len = qdf_min(tag_len, (uint32_t)HTT_RX_REO_MAX_ERR_CODE);
@@ -5549,7 +5549,7 @@ void dp_print_soc_cfg_params(struct dp_soc *soc)
 {
 	struct wlan_cfg_dp_soc_ctxt *soc_cfg_ctx;
 	uint8_t index = 0, i = 0;
-	char ring_mask[DP_MAX_INT_CONTEXTS_STRING_LENGTH];
+	char ring_mask[DP_MAX_INT_CONTEXTS_STRING_LENGTH] = {'\0'};
 	int num_of_int_contexts;
 
 	if (!soc) {