Change in flashrom[master]: tests: Do not run a test if its driver is not built

[Thomas Heijligen (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan, Anastasia Klimchuk.
Thomas Heijligen has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/55295 )

Change subject: tests: Do not run a test if its driver is not built
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Patch Set 4:

(1 comment)

Patchset:

PS4: 
cmocka offers a function TO skip a test. this would make clear, that nothing was executed. Currently a test doing nothing is successful. It should be skipped to make clear that nothing happend.
E.g.:
```
#if CONFIG_LINUX_SPI == 1
run_lifecycle(state, &programmer_linux_spi, "dev=/dev/null");
#else
skip();
#endif
```