intel/broadwell: Don't select MONOTONIC_TIMER_MSR

That's a Haswell exclusive, used nowhere else, but confusing
when hunting for the monotonic timer used on that SoC.

Change-Id: I60ec523e54e5af0d2a418bcb9145de452a3a4ea9
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10034
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/intel/wtm2/Kconfig

@@ -10,7 +10,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select HAVE_SMI_HANDLER
 	select MAINBOARD_HAS_CHROMEOS
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
-	select MONOTONIC_TIMER_MSR
 	select INTEL_INT15
 
 	select CHROMEOS_RAMOOPS_DYNAMIC