device: Always build device_simple.c for less code duplication

Change-Id: Iec0a11d67d7641996f26b3a01352be762006ebb6
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/26292
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/device/Makefile.inc

@@ -26,6 +26,7 @@ postcar-y += device_simple.c
 smm-y += device_simple.c
 verstage-y += device_simple.c
 romstage-y += device_simple.c
+ramstage-y += device_simple.c
 romstage-$(CONFIG_PCI) += pci_early.c
 
 subdirs-y += oprom dram