lib/device_tree: Add some FDT helper functions

This adds some helper functions for FDT, since more and more mainboards
seem to need FDT nowadays. For example our QEMU boards need it in order
to know how much RAM is available. Also all RISC-V boards in our tree
need FDT.

This also adds some tests in order to test said functions.

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I2fb1d93c5b3e1cb2f7d9584db52bbce3767b63d8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81081
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions