[M] Change in coreboot[main]: tree: Use boolean for dptf_enable

[Eric Lai (Code Review)]

Attention is currently required from: Dinesh Gehlot, Elyes Haouas, Eran Mitrani, Erik van den Bogaert, Frans Hendriks, Jakub Czapiga, Jayvik Desai, Jonathon Hall, Kapil Porwal, Lean Sheng Tan, Maxim, Michał Żygowski, Nick Vaccaro, Nico Huber, Piotr Król, Pranava Y N, Rishika Raj, Subrata Banik, Tarun, Werner Zeh.

Eric Lai has posted comments on this change by Elyes Haouas. ( https://review.coreboot.org/c/coreboot/+/84161?usp=email )

Change subject: tree: Use boolean for dptf_enable
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Patch Set 1:

(1 comment)

Patchset:

PS1:
> You can use `bool` and still have `0`/`1` in the devicetree, right? […]

Create ,macro like #define ENABLED true  #define DISABLED false, then you can use in device tree?