[PATCH] x86_64 CONFIG_ACPI=n build fix

Make CONFIG_X86_PM_TIMER dependent on CONFIG_ACPI

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/x86_64/Kconfig

@@ -305,6 +305,7 @@ config HPET_TIMER
 
 config X86_PM_TIMER
 	bool "PM timer"
+	depends on ACPI
 	default y
 	help
 	  Support the ACPI PM timer for time keeping. This is slow,