wlan: Modify hdd_string_to_u8_array to pass separator

Add separator as a parameter to the hdd_string_to_u8_array api.

Change-Id: Ic3a28260dc4cb9144230947f2f106016ccf4d70c
CRs-Fixed: 1093144
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index 39c3303..3834989 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -9235,7 +9235,7 @@
 	hdd_string_to_u8_array(hdd_ctx->cfg_ini->dhcp_srv_ip,
 			       srv_ip,
 			       &num_entries,
-			       IPADDR_NUM_ENTRIES);
+			       IPADDR_NUM_ENTRIES, ".");
 	if (num_entries != IPADDR_NUM_ENTRIES) {
 		hddLog(VOS_TRACE_LEVEL_ERROR,
 		       "%s: incorrect IP address (%s) assigned for DHCP server!",