qcacmn: Add correct api call to get proper boot time

Propagation from qcacld-2.0 to qcacmn

Currently to get clock boottime, qdf_get_monotonic_boottime_ns
api is getting used which does not include the suspend time.

To include the system suspend time also in clock boottime, use
qdf_get_bootbased_boottime_ns api which uses ktime_get_boot_ns
kernel api.

Change-Id: Ibcc628c315201fa3ced7e1ad96753772d91707b2
CRs-Fixed: 2069085

qdf/inc/qdf_time.h

@@ -81,6 +81,21 @@ static inline qdf_time_t qdf_get_system_uptime(void)
 	return __qdf_get_system_uptime();
 }
 
+/**
+ * qdf_get_bootbased_boottime_ns() - Get the bootbased time in nanoseconds
+ *
+ * qdf_get_bootbased_boottime_ns() function returns the number of nanoseconds
+ * that have elapsed since the system was booted. It also includes the time when
+ * system was suspended.
+ *
+ * Return:
+ * The time since system booted in nanoseconds
+ */
+static inline s64 qdf_get_bootbased_boottime_ns(void)
+{
+	return ktime_get_boot_ns();
+}
+
 /**
  * qdf_get_system_timestamp - Return current timestamp
  *