Change in flashrom[master]: spi_master: Add shutdown function in spi_master struct

[Anastasia Klimchuk (Code Review)]

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

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

https://review.coreboot.org/c/flashrom/+/55932

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

Change subject: spi_master: Add shutdown function in spi_master struct
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spi_master: Add shutdown function in spi_master struct

With this, register_spi_master can take care of register_shutdown
as well, and every spi master only needs to call register_spi_master
instead of calling both register_spi_master and register_shutdown.

Testing:
In dummyflasher, comment out free(data) in shutdown. Test fails with error:
../dummyflasher.c:949: note: block 0x55e0727a6e40 allocated here
ERROR: dummy_init_and_shutdown_test_success leaked 1 block(s)
Means, shutdown function is invoked for drivers with "old" API
(so, transitioning from old to new API is not breaking anything).

Next patch in the chain converts spi masters to use new API.

BUG=b:185191942
TEST=builds and ninja test

Change-Id: I2dc80dceca2f8204bcd0dad1f51753d7e79f1af5
Signed-off-by: Anastasia Klimchuk 
---
M programmer.h
M spi.c
2 files changed, 7 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/32/55932/3