qcacld-3.0: Add support for handling the NAN events

As part of supporting NAN DBS, new WMI TLVs are defined so
that Host can maintain the status of NAN Discovery in sync
with the Firmware. Add modules that process these events and
updates the NAN states.

Add support for handling the NAN events.

Change-Id: Icfcd9c33cc410d9a65140f63cac69ddd69742306
CRs-Fixed: 2355383

os_if/nan/inc/os_if_nan.h

@@ -39,19 +39,6 @@
 int os_if_nan_process_ndp_cmd(struct wlan_objmgr_psoc *psoc,
 				const void *data, int data_len);
 
-/**
- * os_if_nan_event_handler: os_if handler api for nan response messages
- * @psoc: pointer to psoc object
- * @vdev: pointer to vdev object
- * @type: message type
- * @msg: msg buffer
- *
- * Return: None
- */
-void os_if_nan_event_handler(struct wlan_objmgr_psoc *psoc,
-			     struct wlan_objmgr_vdev *vdev,
-			     uint32_t type, void *msg);
-
 /**
  * os_if_nan_register_hdd_callbacks: os_if api to register hdd callbacks
  * @psoc: pointer to psoc object
@@ -147,7 +134,8 @@ static inline QDF_STATUS os_if_nan_set_ndp_delete_transaction_id(
 }
 
 /**
- * os_if_process_nan_req: os_if api to handle nan request message
+ * os_if_process_nan_req: os_if api to handle NAN requests attached to the
+ * vendor command QCA_NL80211_VENDOR_SUBCMD_NAN_EXT
  * @psoc: pointer to psoc object
  * @data: request data. contains vendor cmd tlvs
  * @data_len: length of data