qcacmn: Cleanup the tx desc cleanup logic

Cleanup the tx desc clean up logic used in
direct switch and umac reset cases.
The excess code being removed tries to
get the next descriptor address in boundary
conditions is not useful, as the descriptor
extracted this way will be overwritten
immediately in the beginning of next iteration
of the loop.

Change-Id: Ibcd873719929b94147152ff48205774d3ed4f452
CRs-Fixed: 3371831

qdf/inc/qdf_mem.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2014-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. 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
@@ -1112,7 +1112,7 @@ qdf_shared_mem_t *qdf_mem_shared_mem_alloc(qdf_device_t osdev, uint32_t size);
  * @ctxt: Context to be passed to the cb
  * @pages: Multi page information storage
  * @elem_size: Each element size
- * @elem_count: Total number of elements should be allocated
+ * @elem_count: Total number of elements in the pool.
  * @cacheable: Coherent memory or cacheable memory
  * @cb: Callback to free the elements
  * @elem_list: elem list for delayed free