i386: Remove the useless #ifdef in i8253.h

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NChris Wright <chrisw@sous-sol.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>

include/asm-x86/i8253.h

@@ -8,12 +8,8 @@
 
 extern spinlock_t i8253_lock;
 
-#ifdef CONFIG_GENERIC_CLOCKEVENTS
-
 extern struct clock_event_device *global_clock_event;
 
 extern void setup_pit_timer(void);
 
-#endif
-
 #endif	/* __ASM_I8253_H__ */