intel/i440bx: Move LATE_CBMEM_INIT under mainboard

Some of these will move to EARLY_CBMEM_INIT.

Change-Id: Ia969e30ad7097860180bd047eaf81859a42a747c
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/21311
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Keith Hui <buurin@gmail.com>

src/mainboard/biostar/m6tba/Kconfig

@@ -18,6 +18,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y
 	select CPU_INTEL_SLOT_1
 	select NORTHBRIDGE_INTEL_I440BX
+	select LATE_CBMEM_INIT
 	select SOUTHBRIDGE_INTEL_I82371EB
 	select SUPERIO_SMSC_SMSCSUPERIO
 	select HAVE_PIRQ_TABLE