Change in flashrom[master]: tests: Extract setup and teardown for chip tests

[Nico Huber (Code Review)]

Attention is currently required from: Edward O'Callaghan, Angel Pons, Anastasia Klimchuk.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/57436 )

Change subject: tests: Extract setup and teardown for chip tests
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Patch Set 2: Code-Review+2

(1 comment)

File tests/chip.c:

https://review.coreboot.org/c/flashrom/+/57436/comment/de80f98a_0fc8f33c 
PS1, Line 29: g_chip_state
> Good idea, totally makes sense! I was going to do it quickly, but then I realised I don't know how t […]

Alas, there is no proper abstraction yet. Some of the field of struct
flashrom_flashctx look chip specific (e.g. those about SPI 4BA), so
looks like there is a reason for another data pointer even without
the tests.