qcacmn: fix build failure for WIFI_MONITOR_SUPPORT disabled case

The function dp_monitor_reap_timer_suspend() is not
declared for WIFI_MONITOR_SUPPORT disabled case, which
will cause build failure.

To fix it, declare dp_monitor_reap_timer_suspend() in
'dp_internal.h' for WIFI_MONITOR_SUPPORT disabled case.

Change-Id: Id4d246975ccf9eec06a8c794fbbe71f8a934826b
CRs-Fixed: 3309771

dp/wifi3.0/dp_internal.h

@@ -610,6 +610,11 @@ bool dp_monitor_reap_timer_stop(struct dp_soc *soc,
 	return false;
 }
 
+static inline void
+dp_monitor_reap_timer_suspend(struct dp_soc *soc)
+{
+}
+
 static inline
 void dp_monitor_vdev_timer_init(struct dp_soc *soc)
 {