arch/x86: Flag platforms without RELOCATABLE_RAMSTAGE

To flip the Kconfig default, flag some platforms with
NO_RELOCATABLE_RAMSTAGE.

Change-Id: I72c6d07e5a60789bbe0e068a0130d7e3bd07a1d5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/26814
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/Kconfig

@@ -227,6 +227,11 @@ config UBSAN
 	  say N because it adds a small performance penalty and may abort
 	  on code that happens to work in spite of the UB.
 
+config NO_RELOCATABLE_RAMSTAGE
+	bool
+	default n if ARCH_X86
+	default y
+
 config RELOCATABLE_RAMSTAGE
 	depends on EARLY_CBMEM_INIT
 	bool "Build the ramstage to be relocatable in 32-bit address space."