qcacmn: dp: Replace explicit comparison to NULL

Per the Linux Kernel coding style, as enforced by the kernel
checkpatch script, pointers should not be explicitly compared to
NULL. Therefore within dp replace any such comparisons with logical
operations performed on the pointer itself.

Change-Id: I61f3adab1208682d36235421f44a048e35df346d
CRs-Fixed: 2418258

dp/wifi3.0/dp_rx.c

@@ -201,7 +201,7 @@ QDF_STATUS dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
 					RX_BUFFER_ALIGNMENT,
 					FALSE);
 
-		if (rx_netbuf == NULL) {
+		if (!rx_netbuf) {
 			DP_STATS_INC(dp_pdev, replenish.nbuf_alloc_fail, 1);
 			continue;
 		}
@@ -578,7 +578,7 @@ void dp_rx_fill_mesh_stats(struct dp_vdev *vdev, qdf_nbuf_t nbuf,
 
 	/* upper layers are resposible to free this memory */
 
-	if (rx_info == NULL) {
+	if (!rx_info) {
 		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
 			"Memory allocation failed for mesh rx stats");
 		DP_STATS_INC(vdev->pdev, mesh_mem_alloc, 1);
@@ -900,7 +900,7 @@ uint8_t dp_rx_process_invalid_peer(struct dp_soc *soc, qdf_nbuf_t mpdu)
 		qdf_spin_unlock_bh(&pdev->vdev_list_lock);
 	}
 
-	if (NULL == vdev) {
+	if (!vdev) {
 		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
 			  "VDEV not found");
 		goto free;
@@ -1672,7 +1672,7 @@ done:
 	}
 
 	/* Peer can be NULL is case of LFR */
-	if (qdf_likely(peer != NULL))
+	if (qdf_likely(peer))
 		vdev = NULL;
 
 	/*
@@ -1735,7 +1735,7 @@ done:
 			deliver_list_tail = NULL;
 		}
 
-		if (qdf_likely(peer != NULL)) {
+		if (qdf_likely(peer)) {
 			vdev = peer->vdev;
 		} else {
 			DP_STATS_INC_PKT(soc, rx.err.rx_invalid_peer, 1,
@@ -1746,7 +1746,7 @@ done:
 			continue;
 		}
 
-		if (qdf_unlikely(vdev == NULL)) {
+		if (qdf_unlikely(!vdev)) {
 			tid_stats->fail_cnt[INVALID_PEER_VDEV]++;
 			qdf_nbuf_free(nbuf);
 			nbuf = next;
@@ -2058,7 +2058,7 @@ dp_rx_nbuf_prepare(struct dp_soc *soc, struct dp_pdev *pdev)
 					RX_BUFFER_ALIGNMENT,
 					FALSE);
 
-		if (nbuf == NULL) {
+		if (!nbuf) {
 			DP_STATS_INC(pdev,
 				replenish.nbuf_alloc_fail, 1);
 			continue;