qcacmn: Fix dp wifi3.0 documentation

The kernel-doc script identified a large number of kernel-doc issues
in the dp/wifi3.0 folder. A series of patches have addressed most of
the issues, so now fix the remaining issues. Just like in the previous
patches, there are a number of instances where public functions have
their implementation documented instead of having their interface
documented, so make sure that the interfaces are documented.

Change-Id: I4bc39b0e1a9d8c264b72ec6db76ff7e92d24f277
CRs-Fixed: 3373822

dp/wifi3.0/dp_hist.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2020 The Linux Foundation. All rights reserved.
- * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2023 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
@@ -18,8 +18,8 @@
  */
 
 /**
- * @file dp_hist.h
- * @brief: histogram header file
+ * DOC: dp_hist.h
+ *      histogram header file
  */
 
 #ifndef __DP_HIST_H_
@@ -27,20 +27,43 @@
 
 #define HIST_AVG_WEIGHT_DENOM 4
 
-/*
- * dp_hist_update_stats: Update histogram stats
- * @hist_delay: Delay histogram
+/**
+ * dp_hist_update_stats() - Update histogram stats
+ * @hist_stats: Delay histogram
  * @value: Delay value
  *
  * Return: void
  */
 void dp_hist_update_stats(struct cdp_hist_stats *hist_stats, int value);
+
+/**
+ * dp_hist_init() - Initialize the histogram object
+ * @hist_stats: Hist stats object
+ * @hist_type: Histogram type
+ */
 void dp_hist_init(struct cdp_hist_stats *hist_stats,
 		  enum cdp_hist_types hist_type);
+
+/**
+ * dp_accumulate_hist_stats() - Accumulate the hist src to dst
+ * @src_hist_stats: Source histogram stats
+ * @dst_hist_stats: Destination histogram stats
+ *
+ * Return: void
+ */
 void dp_accumulate_hist_stats(struct cdp_hist_stats *src_hist_stats,
 			      struct cdp_hist_stats *dst_hist_stats);
+
+/**
+ * dp_copy_hist_stats() - Copy the histogram stats
+ * @src_hist_stats: Source histogram stats
+ * @dst_hist_stats: Destination histogram stats
+ *
+ * Return: void
+ */
 void dp_copy_hist_stats(struct cdp_hist_stats *src_hist_stats,
 			struct cdp_hist_stats *dst_hist_stats);
+
 const char *dp_hist_tx_hw_delay_str(uint8_t index);
 const char *dp_hist_delay_percentile_str(uint8_t index);
 #endif /* __DP_HIST_H_ */