mb/prodrive/atlas: Increase CBFS size to 8MB

Signed-off-by: Lean Sheng Tan <sheng.tan@9elements.com>
Change-Id: I7c50f770c3a7ab261d6ea41f945e2239ba53fd09
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64944
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/prodrive/atlas/Kconfig

@@ -34,4 +34,7 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config CBFS_SIZE
+	default 0x800000
+
 endif #BOARD_PRODRIVE_ATLAS_BASEBOARD