qcacmn: Remove unnecessary checks in Tx path

1. Remove prints in per packet path
2. Add prefecth for skb shinfo
3. Avoid qdf_get_cpu() in DP tx

Change-Id: I86d196cc7865a2d5b3a5a6098f6f7d84397a60d0
CRs-Fixed: 3227568

dp/wifi3.0/be/dp_be_tx.c

@@ -637,11 +637,6 @@ dp_tx_hw_enqueue_be(struct dp_soc *soc, struct dp_vdev *vdev,
 	dp_tx_set_min_rates_for_critical_frames(soc, hal_tx_desc_cached,
 						tx_desc->nbuf);
 	dp_tx_desc_set_ktimestamp(vdev, tx_desc);
-	dp_verbose_debug("length:%d , type = %d, dma_addr %llx, offset %d desc id %u",
-			 tx_desc->length,
-			 (tx_desc->flags & DP_TX_DESC_FLAG_FRAG),
-			 (uint64_t)tx_desc->dma_addr, tx_desc->pkt_offset,
-			 tx_desc->id);
 
 	hal_ring_hdl = dp_tx_get_hal_ring_hdl(soc, ring_id);