sched: fix SCHED_HRTICK dependency

Currently, it seems SCHED_HRTICK allowed for !SMP. But, it seems to have
no dependency of it. Fix it.
Signed-off-by: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/Kconfig.hz

@@ -55,4 +55,4 @@ config HZ
 	default 1000 if HZ_1000
 
 config SCHED_HRTICK
-	def_bool HIGH_RES_TIMERS && USE_GENERIC_SMP_HELPERS
+	def_bool HIGH_RES_TIMERS && (!SMP || USE_GENERIC_SMP_HELPERS)