arch/x86: Always select RELOCATABLE_MODULES

All boards except those with NO_RELOCATABLE_RAMSTAGE
or explicit select already had this feature built.

Change-Id: I838e12141243ec49c2555c09269e07476eb0cfad
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/26816
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/cpu/x86/Kconfig

@@ -101,7 +101,6 @@ config LOGICAL_CPUS
 config SMM_TSEG
 	bool
 	default n
-	select RELOCATABLE_MODULES
 
 config SMM_MODULE_HEAP_SIZE
 	hex