CBMEM: Always use DYNAMIC_CBMEM

Drop the implementation of statically allocated high memory
region for CBMEM. There is no longer the need to explicitly
select DYNAMIC_CBMEM, it is the only remaining choice.

Change-Id: Iadf6f27a134e05daa1038646d0b4e0b8f9f0587a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7851
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/lib/Makefile.inc

@@ -82,17 +82,8 @@ ramstage-y += memrange.c
 ramstage-$(CONFIG_COOP_MULTITASKING) += thread.c
 ramstage-$(CONFIG_TIMER_QUEUE) += timer_queue.c
 
-# The CBMEM implementations are chosen based on CONFIG_DYNAMIC_CBMEM.
-ifeq ($(CONFIG_DYNAMIC_CBMEM),y)
-ramstage-y += dynamic_cbmem.c
-romstage-y += dynamic_cbmem.c
-else
-ramstage-y += cbmem.c
-romstage-y += cbmem.c
-endif # CONFIG_DYNAMIC_CBMEM
-
-romstage-y += cbmem_common.c
-ramstage-y += cbmem_common.c
+romstage-y += cbmem_common.c dynamic_cbmem.c
+ramstage-y += cbmem_common.c dynamic_cbmem.c
 
 ramstage-y += hexdump.c
 romstage-y += hexdump.c