qcacld-3.0: Fix pdev undeclared issue

In function hdd_ocb_register_sta(), it will call function
cdp_peer_register(soc, (struct cdp_pdev *)pdev, &sta_desc), but pdev
is undeclared.

Change-Id: Ie0341b8ff880c21960a655399378b519fc240631
CRs-Fixed: 2595641

core/hdd/src/wlan_hdd_ocb.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011-2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2011-2020 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -219,6 +219,7 @@ static int hdd_ocb_register_sta(struct hdd_adapter *adapter)
 	struct hdd_station_ctx *sta_ctx = WLAN_HDD_GET_STATION_CTX_PTR(adapter);
 	struct ol_txrx_ops txrx_ops;
 	void *soc = cds_get_context(QDF_MODULE_ID_SOC);
+	struct cdp_pdev *pdev = cds_get_context(QDF_MODULE_ID_TXRX);
 
 	qdf_status = cdp_peer_register_ocb_peer(soc,
 				adapter->mac_addr.bytes);