binaryPI: Enable RELOCATABLE_RAMSTAGE

Change-Id: I0c0058be002e409bd16d2d75fd404df94407df4e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/19348
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/northbridge/amd/pi/Kconfig

@@ -18,6 +18,7 @@ config NORTHBRIDGE_AMD_PI
 	default y if CPU_AMD_PI
 	default n
 	select CBMEM_TOP_BACKUP
+	select RELOCATABLE_RAMSTAGE
 
 if NORTHBRIDGE_AMD_PI