sched/clock/: Don't call up_timer_gettime in clock_gettime and clock_systimer to ensure the return value from them consistent with clock_systimespec

sched/clock/clock_gettime.c

@@ -93,11 +93,7 @@ int clock_gettime(clockid_t clock_id, struct timespec *tp)
        * reset.
        */
 
-#if defined(CONFIG_SCHED_TICKLESS)
-      ret = up_timer_gettime(tp);
-#else
       ret = clock_systimespec(tp);
-#endif
     }
   else
 #endif
@@ -118,13 +114,8 @@ int clock_gettime(clockid_t clock_id, struct timespec *tp)
 
 #if defined(CONFIG_CLOCK_TIMEKEEPING)
       ret = clock_timekeeping_get_wall_time(tp);
-#elif defined(CONFIG_SCHED_TICKLESS)
-      ret = up_timer_gettime(&ts);
 #else
       ret = clock_systimespec(&ts);
-#endif
-
-#ifndef CONFIG_CLOCK_TIMEKEEPING
       if (ret == OK)
         {
           irqstate_t flags;

sched/clock/clock_systimer.c

@@ -97,7 +97,7 @@ clock_t clock_systimer(void)
 
   /* Get the time from the platform specific hardware */
 
-  (void)up_timer_gettime(&ts);
+  (void)clock_systimespec(&ts);
 
   /* Convert to a 64-bit value in microseconds, then in clock tick units */
 
@@ -110,7 +110,7 @@ clock_t clock_systimer(void)
 
   /* Get the time from the platform specific hardware */
 
-  (void)up_timer_gettime(&ts);
+  (void)clock_systimespec(&ts);
 
   /* Convert to a 64- then a 32-bit value */