x86: move pmtmr related declarations

Move more stuff out of proto.h

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index 3de3764..0cb14d4 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -26,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/ioport.h>
 #include <linux/clockchips.h>
+#include <linux/acpi_pmtmr.h>
 
 #include <asm/atomic.h>
 #include <asm/smp.h>