make: Formalize phonies and document tool path vars

pulp-platform / cheshire

A minimal Linux-capable 64-bit RISC-V SoC built around CVA6

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Closed paulsc96 closed 1 month ago

paulsc96 commented 1 month ago

Explicitly collect phonies in CHS_PHONY:
- cleaner approach
- fixes tricky issues with recursive make invocation
Provides a list of defined phonies through make help
Documents tool paths used (Fixes #130).