Extract the steps to parse and override a devicetree into a function so it can be used multiple times without copying the same logic. Change-Id: I4e496a223757beb22e3bd678eb6115968bd32529 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/44036 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Nick Vaccaro <nvaccaro@google.com>