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

[Anastasia Klimchuk (Code Review)]

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

Change subject: tests: Do not build a test if its driver is not built
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Patch Set 2:

(1 comment)

File tests/init_shutdown.c:

https://review.coreboot.org/c/flashrom/+/55295/comment/37d416c3_fbf16b73 
PS1, Line 35: #if CONFIG_DUMMY == 1
            : void dummy_init_and_shutdown_test_success(void **state)
            : {
            : 	run_lifecycle(state, PROGRAMMER_DUMMY, "bus=parallel+lpc+fwh+spi");
            : }
            : #endif /* CONFIG_DUMMY */
> or […]

Thank you for inspiration! now this looks much better, and only one file needs to have guards.
The reason I added #if is because when for example CONFIG_MEC1308=no then PROGRAMMER_MEC1308 does not exist and does not compile (because it is guarded by CONFIG_MEC1308, it would be "error: ‘PROGRAMMER_MEC1308’ undeclared"). PROGRAMMER_MEC1308 will change to &programmer_mec1308 after CB:55121 but still guarded.
I am fine with empty test which runs and does nothing, but I want everything to build even if defaults are changed.