qcacmn: Refine struct wmi_unified_pmk_cache (phase 2)

The original definition of struct wmi_unified_pmk_cache had several
anomalies:
1) It contains an unnecessary tlv_header field. Only the fw-api
   structs should contain TLV headers.
2) It contains a mis-named session_id field. Common structures should
   use converged terminology, in this case vdev_id

Change If4be27111c604c16ea437aa654210cdff28220a7 ("qcacmn: Refine
struct wmi_unified_pmk_cache (phase 1)") completely addressed the
first issue, and as the first phase of fixing the second issue it
replaced the session_id field with an anonymous union which contains
both the existing session_id field and a new vdev_id field. Being part
of a union these field will overlay each other.

For phase 2 replace the reference to session_id with a reference to
vdev_id in send_set_del_pmkid_cache_cmd_tlv().

Change-Id: Ie8cc453751b95c332e3df32794506a4bd3c324ad
CRs-Fixed: 2363431

wmi/src/wmi_unified_sta_tlv.c

@@ -1586,7 +1586,7 @@ static QDF_STATUS send_set_del_pmkid_cache_cmd_tlv(wmi_unified_t wmi_handle,
 		 WMITLV_GET_STRUCT_TLVLEN(
 			wmi_pdev_update_pmk_cache_cmd_fixed_param));
 
-	cmd->vdev_id = pmk_info->session_id;
+	cmd->vdev_id = pmk_info->vdev_id;
 
 	/* If pmk_info->pmk_len is 0, this is a flush request */
 	if (!pmk_info->pmk_len) {