qcacld-3.0: Reset nbuf data offset properly in RX fast path handling

Currently RX nbuf data pointer is reset considering
headroom reserve size of NET_SKB_PAD. So while reattaching
buffer back to H.W always data pointer is reset back to head plus
NET_SKB_PAD offset. But if skb is not allocated with head room
reserve then we should not reset data pointer taking NET_SKB_PAD
as consideration.

Fix this by pushing nbuf data pointer back to the state when
nbuf entered the host.

Change-Id: I1c3838a54f87f747e3695e86e54e0e663ba4f182
CRs-Fixed: 3582877

core/dp/htt/htt_t2h.c

@@ -1088,8 +1088,8 @@ void htt_t2h_msg_handler(void *context, HTC_PACKET *pkt)
 #ifdef WLAN_FEATURE_FASTPATH
 #define HTT_T2H_MSG_BUF_REINIT(_buf, dev)				\
 	do {								\
-		QDF_NBUF_CB_PADDR(_buf) -= (HTC_HEADER_LEN +		\
-					HTC_HDR_ALIGNMENT_PADDING);	\
+		qdf_nbuf_push_head(_buf, (HTC_HEADER_LEN) +		\
+				   HTC_HDR_ALIGNMENT_PADDING);		\
 		qdf_nbuf_init_fast((_buf));				\
 		qdf_mem_dma_sync_single_for_device(dev,			\
 					(QDF_NBUF_CB_PADDR(_buf)),	\