arch/x86: Make RELOCATABLE_RAMSTAGE the default

No need to provide an option to try disable this.

Also remove explicit ´select RELOCATABLE_MODULES'
lines from platform Kconfigs.

Change-Id: I5fb169f90331ce37b4113378405323ec856d6fee
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/26815
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/northbridge/intel/x4x/Kconfig

@@ -25,7 +25,6 @@ config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
 	select LAPIC_MONOTONIC_TIMER
 	select VGA
 	select INTEL_GMA_ACPI
-	select RELOCATABLE_RAMSTAGE
 	select HAVE_LINEAR_FRAMEBUFFER if MAINBOARD_DO_NATIVE_VGA_INIT
 	select HAVE_VGA_TEXT_FRAMEBUFFER if MAINBOARD_DO_NATIVE_VGA_INIT
 	select CACHE_MRC_SETTINGS