[M] Change in flashrom[master]: ch341a_spi: Refactor singleton states into reentrant pattern

[Alexander Goncharov (Code Review)]

Attention is currently required from: Edward O'Callaghan, Anastasia Klimchuk.

Hello build bot (Jenkins), Edward O'Callaghan, Anastasia Klimchuk,

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

https://review.coreboot.org/c/flashrom/+/72807

to look at the new patch set (#3).

Change subject: ch341a_spi: Refactor singleton states into reentrant pattern
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ch341a_spi: 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 patchset also includes stdlib.h to be able to work with
memory allocation. Pass programmer's data as a parameter to
functions that need it.

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 specified below.

TOPIC=register_master_api
TEST=Tested on flash W25Q128JVSQ
flashrom -E              # Result: success
flashrom -v ff.bin       # Result: verified
flashrom -w firmware.bin # Result: success
flashrom -v firmware.bin # Result: verified

Change-Id: I9fe72bff88b7f8778c1199bdab8ba43bf32e1c8c
Signed-off-by: Alexander Goncharov 
Ticket: https://ticket.coreboot.org/issues/391
---
M ch341a_spi.c
1 file changed, 113 insertions(+), 78 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/07/72807/3