spi25: Remove now obsolete `four_bytes_addr_funcs` path

Change-Id: Idb7c576cb159630da2268813388b497cb5f46b43
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/22386
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
4 files changed