qcacmn: Add histogram framework for DP path

A new framework added to calculate the per packet level
histogram

Change-Id: Iac52f7a672fa2afe1d6aec26931a8bc3115c6a98

dp/wifi3.0/dp_hist.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2020 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
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * @file dp_hist.h
+ * @brief: histogram header file
+ */
+
+#ifndef __DP_HIST_H_
+#define __DP_HIST_H_
+
+#define HIST_AVG_WEIGHT_DENOM 4
+
+/*
+ * dp_hist_update_stats: Update histogram stats
+ * @hist_delay: Delay histogram
+ * @value: Delay value
+ *
+ * Return: void
+ */
+void dp_hist_update_stats(struct cdp_hist_stats *hist_stats, int value);
+void dp_hist_init(struct cdp_hist_stats *hist_stats,
+		  enum cdp_hist_types hist_type);
+
+#endif /* __DP_HIST_H_ */