Change in flashrom[master]: pickit2_spi.c: Refactor singleton states into reentrant pattern

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan, Angel Pons.
Hello build bot (Jenkins), Nico Huber, Edward O'Callaghan, Angel Pons, 

I'd like you to reexamine a change. Please visit

    https://review.coreboot.org/c/flashrom/+/52774

to look at the new patch set (#2).

Change subject: pickit2_spi.c: Refactor singleton states into reentrant pattern
......................................................................

pickit2_spi.c: Refactor singleton states into reentrant pattern

Move global singleton states into a struct and store within
the spi_master data field for the life-time of the driver.

This is one of the steps on the way to move spi_master data
memory management behind the initialisation API, for more
context see other patches under the same topic "register_master_api".

TEST=builds
BUG=b:185191942

Change-Id: Ibacc4738bee02c371c41583d321e0337128ad18a
Signed-off-by: Anastasia Klimchuk <[e-mail]>
---
M pickit2_spi.c
1 file changed, 37 insertions(+), 16 deletions(-)


  git pull ssh://review.coreboot.org:29418/flashrom refs/changes/74/52774/2
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Gerrit-Project: flashrom
Gerrit-Branch: master
Gerrit-Change-Id: Ibacc4738bee02c371c41583d321e0337128ad18a
Gerrit-Change-Number: 52774
Gerrit-PatchSet: 2
Gerrit-Owner: Anastasia Klimchuk <[e-mail]>
Gerrit-Reviewer: Angel Pons <[e-mail]>
Gerrit-Reviewer: Edward O'Callaghan <[e-mail]>
Gerrit-Reviewer: Nico Huber <[e-mail]>
Gerrit-Reviewer: build bot (Jenkins) <[e-mail]>
Gerrit-CC: Paul Menzel <[e-mail]>
Gerrit-Attention: Nico Huber <[e-mail]>
Gerrit-Attention: Edward O'Callaghan <[e-mail]>
Gerrit-Attention: Angel Pons <[e-mail]>
Gerrit-MessageType: newpatchset