accel/tcg/icount-common: Consolidate the use of warn_report_once()

Use warn_report_once() to get rid of the static local variable "notified".

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Message-ID: <20240418100716.1085491-1-zhao1.liu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

accel/tcg/icount-common.c

@@ -336,10 +336,8 @@ void icount_start_warp_timer(void)
     deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
                                           ~QEMU_TIMER_ATTR_EXTERNAL);
     if (deadline < 0) {
-        static bool notified;
-        if (!icount_sleep && !notified) {
-            warn_report("icount sleep disabled and no active timers");
-            notified = true;
+        if (!icount_sleep) {
+            warn_report_once("icount sleep disabled and no active timers");
         }
         return;
     }