qcacmn: htc: 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 htc replace any such comparisons with logical
operations performed on the pointer itself.

Change-Id: Ibb6d24aff9824d7e7cf253c1fe3081443cbfb63b
CRs-Fixed: 2418252

htc/htc_packet.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, 2016-2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2014, 2016-2017, 2019 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
@@ -242,7 +242,7 @@ static inline HTC_PACKET *htc_packet_dequeue(HTC_PACKET_QUEUE *queue)
 {
 	DL_LIST *pItem = dl_list_remove_item_from_head(&queue->QueueHead);
 
-	if (pItem != NULL) {
+	if (pItem) {
 		queue->Depth--;
 		return A_CONTAINING_STRUCT(pItem, HTC_PACKET, ListLink);
 	}
@@ -254,7 +254,7 @@ static inline HTC_PACKET *htc_packet_dequeue_tail(HTC_PACKET_QUEUE *queue)
 {
 	DL_LIST *pItem = dl_list_remove_item_from_tail(&queue->QueueHead);
 
-	if (pItem != NULL) {
+	if (pItem) {
 		queue->Depth--;
 		return A_CONTAINING_STRUCT(pItem, HTC_PACKET, ListLink);
 	}