Change in flashrom[master]: programmer: Smoothen register_spi_master() API

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan.
Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/54066 )

Change subject: programmer: Smoothen register_spi_master() API
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Patch Set 1:

(1 comment)

Patchset:

PS1:
> https://review.coreboot.org/c/flashrom/+/51676 […]

Mine was CB:51761 which has everyone +2s and it was the end goal to submit after I do all refactorings.
Yeah it has overlap with this one... but I would need to do more function signature changes, not only data, also data size and shutdown function.

I still have lots of global state to remove, and if this one and next one in the chain both are submitted I would need one less line for every refactoring.