[S] Change in flashrom[master]: dummyflasher: use new API to register shutdown function

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Edward O'Callaghan, Alexander Goncharov.

Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/72408 )

Change subject: dummyflasher: use new API to register shutdown function
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Patch Set 2:

(1 comment)

File dummyflasher.c:

https://review.coreboot.org/c/flashrom/+/72408/comment/96df9a22_2e108c33 
PS2, Line 1416: data->refs_cnt += ((dummy_buses_supported & BUS_PROG) != BUS_NONE);
              : 	data->refs_cnt += ((dummy_buses_supported & BUS_NONSPI) != BUS_NONE);
              : 	data->refs_cnt += ((dummy_buses_supported & BUS_SPI) != BUS_NONE);
              : 
              : #if 0
              : 	data->refs_cnt += (dummy_buses_supported & BUS_PROG) ? 1 : 0;
              : 	data->refs_cnt += (dummy_buses_supported & BUS_NONSPI) ? 1 : 0;
              : 	data->refs_cnt += (dummy_buses_supported & BUS_SPI) ? 1 : 0;
              : #endif
> I thought about it at first sight. But this approach may potentially cause flashrom to crash. […]

Okay, I understand, thanks for explanation!
The main thing I take from this is: if any one register_master fails, init fails. But the code at the moment is trying to register all masters anyway. Even though just one failure makes init fail.

I still want to use the same conditions. Technically, refs_cnt should increase for every successful register master. So an amendment to my initial idea: add

if (!ret)
   refs_cnt++;

into every if below
?