Change in flashrom[master]: sb600spi.c: Move sb600_spibar into spi data instead of being global

[Edward O'Callaghan (Code Review)]

Attention is currently required from: Nico Huber, Angel Pons, Anastasia Klimchuk.
Edward O'Callaghan has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/54712 )

Change subject: sb600spi.c: Move sb600_spibar into spi data instead of being global
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Patch Set 1: Code-Review+2

(1 comment)

File sb600spi.c:

https://review.coreboot.org/c/flashrom/+/54712/comment/dcbee9ee_d0a9dbcb 
PS1, Line 610: free(data);
> I am not quite sure whether I need to free sb600_data->sb600_spibar here. […]

not free'ed as its physical memory but technically it should be unmapped yes although I think everyone leaks it across the tree and its there is about five'ish cases of spibar being a global.