[PATCH] x86_64: Only let user select PM timer support when EMBEDDED

To avoid mistakes.

I got a few reports where people got broken timing because they didn't
have the PMTIMER fallback.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/x86_64/Kconfig

@@ -350,7 +350,7 @@ config HPET_TIMER
 	  <http://www.intel.com/hardwaredesign/hpetspec.htm>.
 
 config X86_PM_TIMER
-	bool "PM timer"
+	bool "PM timer" if EMBEDDED
 	depends on ACPI
 	default y
 	help