qemu-timer: Fix compilation for non-POSIX hosts

A compiler warning is caused by the unused local function reinit_timers
on non-POSIX hosts. Include that function only for POSIX hosts.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

qemu-timer.c

@@ -745,6 +745,7 @@ static void quit_timers(void)
     t->stop(t);
 }
 
+#ifdef CONFIG_POSIX
 static void reinit_timers(void)
 {
     struct qemu_alarm_timer *t = alarm_timer;
@@ -755,6 +756,7 @@ static void reinit_timers(void)
     }
     qemu_rearm_alarm_timer(t);
 }
+#endif /* CONFIG_POSIX */
 
 int init_timer_alarm(void)
 {