qcacmn: Send kernel time to userspace

Send kernel timestamp to userspace via a
new vendor attribute
QCA_WLAN_VENDOR_ATTR_DIAG_KERNEL_TIMESTAMP.

Change-Id: Iec957f0516c06369e0d2991d96936cb1f7fff5f4
CRs-Fixed: 3150781

qdf/inc/qdf_time.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2014-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022 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
@@ -336,6 +337,18 @@ static inline int64_t qdf_ktime_to_ms(qdf_ktime_t ktime)
 	return __qdf_ktime_to_ms(ktime);
 }
 
+/**
+ * qdf_ktime_to_us - Convert the qdf_ktime_t object into microseconds
+ * @ktime: time as qdf_ktime_t object
+ *
+ * Return: qdf_ktime_t in microseconds
+ */
+
+static inline int64_t qdf_ktime_to_us(qdf_ktime_t ktime)
+{
+	return __qdf_time_ktime_to_us(ktime);
+}
+
 /**
  * qdf_ktime_to_ns - Convert the qdf_ktime_t object into nanoseconds
  * @ktime: time as qdf_ktime_t object