`devicetree.cb` is the default value for the Kconfig DEVICETREE
setting. Drop redundant configurations.
Change-Id: I5eded3d5e38ca80986da2fda95050815c2702f82
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52504
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
78976c153a