Revert "cpuidle: build fix for non-x86"

This reverts commit f7573970.
which ironically broke the ia64 build

arch/x86/Kconfig

@@ -98,9 +98,6 @@ config ARCH_HAS_ILOG2_U32
 config ARCH_HAS_ILOG2_U64
 	def_bool n
 
-config ARCH_HAS_CPU_IDLE_WAIT
-	def_bool y
-
 config GENERIC_CALIBRATE_DELAY
 	def_bool y
 

drivers/cpuidle/cpuidle.c

@@ -83,7 +83,7 @@ void cpuidle_uninstall_idle_handler(void)
 {
 	if (enabled_devices && (pm_idle != pm_idle_old)) {
 		pm_idle = pm_idle_old;
-		cpuidle_kick_cpus();
+		cpu_idle_wait();
 	}
 }
 

include/linux/cpuidle.h

@@ -73,19 +73,6 @@ cpuidle_set_statedata(struct cpuidle_state *state, void *data)
 	state->driver_data = data;
 }
 
-#ifdef CONFIG_SMP
-#ifdef CONFIG_ARCH_HAS_CPU_IDLE_WAIT
-static inline void cpuidle_kick_cpus(void)
-{
-	cpu_idle_wait();
-}
-#else /* !CONFIG_ARCH_HAS_CPU_IDLE_WAIT */
-#error "Arch needs cpu_idle_wait() equivalent here"
-#endif /* !CONFIG_ARCH_HAS_CPU_IDLE_WAIT */
-#else /* !CONFIG_SMP */
-static inline void cpuidle_kick_cpus(void) {}
-#endif /* !CONFIG_SMP */
-
 struct cpuidle_state_kobj {
 	struct cpuidle_state *state;
 	struct completion kobj_unregister;