[PATCH] x86_64 hpet: fix function warning

put function prototype outside of #ifdef block, to fix:
arch/x86_64/kernel/time.c:941: warning: implicit declaration of
function `oem_force_hpet_timer'
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Cc: <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-x86_64/hpet.h

@@ -46,6 +46,7 @@
 
 extern int is_hpet_enabled(void);
 extern int hpet_rtc_timer_init(void);
+extern int oem_force_hpet_timer(void);
 
 #ifdef CONFIG_HPET_EMULATE_RTC
 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
@@ -54,7 +55,6 @@ extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned ch
 extern int hpet_set_periodic_freq(unsigned long freq);
 extern int hpet_rtc_dropped_irq(void);
 extern int hpet_rtc_timer_init(void);
-extern int oem_force_hpet_timer(void);
 #endif /* CONFIG_HPET_EMULATE_RTC */
 
 #endif