qcacmn: Add HTC Credit History Feature flag

Add compilation flag to compile out HTC credit History
feature cleanly from the cld-3.2 driver binary

Change-Id: I615f0e4d6de150924b99b3444cebf00571ddc088
CRs-Fixed: 2190546

htc/htc_credit_history.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ *
+ * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
+ *
+ *
+ * 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.
+ */
+
+/*
+ * This file was originally distributed by Qualcomm Atheros, Inc.
+ * under proprietary terms before Copyright ownership was assigned
+ * to the Linux Foundation.
+ */
+
+#ifndef _HTC_CREDIT_HISTORY_H_
+#define _HTC_CREDIT_HISTORY_H_
+
+#include "htc_internal.h"
+
+#ifdef FEATURE_HTC_CREDIT_HISTORY
+
+/**
+ * htc_credit_history_init(): Init helper function to initialize HTC credit
+ *                            history buffers and variable.
+ * Return: None
+ */
+
+void htc_credit_history_init(void);
+void htc_credit_record(enum htc_credit_exchange_type type, uint32_t tx_credit,
+			uint32_t htc_tx_queue_depth);
+
+#else /* FEATURE_HTC_CREDIT_HISTORY */
+
+static inline
+void htc_credit_history_init(void)
+{
+}
+
+static inline
+void htc_credit_record(enum htc_credit_exchange_type type, uint32_t tx_credit,
+			uint32_t htc_tx_queue_depth)
+{ }
+#endif /* FEATURE_HTC_CREDIT_HISTORY */
+#endif /* _HTC_CREDIT_HISTORY_H_ */