[flashrom-gerrit] Change in flashrom[master]: stlinkv3_spi.c: Refactor singleton states into reentrant pattern

[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/+/54042 )

Change subject: stlinkv3_spi.c: Refactor singleton states into reentrant pattern
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Patch Set 1:

(1 comment)

File stlinkv3_spi.c:

https://review.coreboot.org/c/flashrom/+/54042/comment/a0f9ff73_4e2d8b22 
PS1, Line 528: 			return -1;
> Looks like another problematic case?

I didn't realize how early the handle is opened. I somehow assumed
stlinkv3_spi_open(), d'oh. This one could simply be fixed by switching
the order. No need to open the handle before parsing `spispeed`, right?