CBMEM: Always have early initialisation

Assume EARLY_CBMEM_INIT=y everywhere and remove option from Kconfig.

If romstage does not make the cbmem_initialize() call, features like
COLLECT_TIMESTAMPS and early CBMEM_CONSOLE will execute during
romstage, but that data will get lost as no CAR migration is
executed.

Change-Id: I5615645ed0f5fd78fbc372cf5c3da71a3134dd85
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3917
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/mainboard/emulation/qemu-i440fx/Kconfig

@@ -11,7 +11,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select HAVE_ACPI_TABLES
 	select HAVE_ACPI_RESUME
 	select BOARD_ROMSIZE_KB_256
-	select EARLY_CBMEM_INIT
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 
 config MAINBOARD_DIR