mb/lenovo/t410: Set default CBFS size

Set the default CBFS size to cover the whole BIOS region.

Change-Id: If719a9cd2897d933df53bd423e71503b832411fe
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40776
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/lenovo/t410/Kconfig

@@ -39,6 +39,9 @@ config VBOOT_VBNV_OFFSET
 	hex
 	default 0x2a
 
+config CBFS_SIZE
+	default 0x300000
+
 config FMDFILE
 	string
 	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/vboot-rwa.fmd" if VBOOT