Remove the set but unused variable base in alarm_clock_get to fix the
following warning when building with 'W=1':
  kernel/time/alarmtimer.c: In function ‘alarm_timer_create’:
  kernel/time/alarmtimer.c:545:21: warning: variable ‘base’ set but not used [-Wunused-but-set-variable]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20161017094702.10873-1-tklauser@distanz.ch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 static int alarm_timer_create(struct k_itimer *new_timer)
 {
        enum  alarmtimer_type type;
-       struct alarm_base *base;
 
        if (!alarmtimer_get_rtcdev())
                return -ENOTSUPP;
                return -EPERM;
 
        type = clock2alarm(new_timer->it_clock);
-       base = &alarm_bases[type];
        alarm_init(&new_timer->it.alarm.alarmtimer, type, alarm_handle_timer);
        return 0;
 }