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/cpu/intel/haswell/Kconfig

@@ -19,7 +19,6 @@ config CPU_SPECIFIC_OPTIONS
 	select SMM_MODULES
 	select RELOCATABLE_MODULES
 	select RELOCATABLE_RAMSTAGE
-	select DYNAMIC_CBMEM
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	#select AP_IN_SIPI_WAIT
 	select TSC_SYNC_MFENCE

src/cpu/intel/haswell/romstage.c

@@ -75,14 +75,11 @@ static inline u32 *stack_push(u32 *stack, u32 value)
 static unsigned long choose_top_of_stack(void)
 {
 	unsigned long stack_top;
-#if CONFIG_DYNAMIC_CBMEM
+
 	/* cbmem_add() does a find() before add(). */
 	stack_top = (unsigned long)cbmem_add(CBMEM_ID_ROMSTAGE_RAM_STACK,
 	                                     ROMSTAGE_RAM_STACK_SIZE);
 	stack_top += ROMSTAGE_RAM_STACK_SIZE;
-#else
-	stack_top = CONFIG_RAMTOP;
-#endif
 	return stack_top;
 }