mb/getac/p470: Do not select EARLY_CBMEM_INIT

This is selected by default and not overwritten anywhere else for this
board.

Change-Id: I0f803e130366ee322163f7bb6fa16cac75f5416e
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/18541
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins)

src/mainboard/getac/p470/Kconfig

@@ -33,7 +33,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select UDELAY_LAPIC
 	select BOARD_ROMSIZE_KB_1024
 	select CHANNEL_XOR_RANDOMIZATION
-	select EARLY_CBMEM_INIT
 	select VGA
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_HAS_NATIVE_VGA_INIT_TEXTMODECFG