Change in coreboot[master]: soc/intel/cmn/fast_spi: Add API to check if SPI Cycle In Progress

[Werner Zeh (Code Review)]

Attention is currently required from: Subrata Banik, Tim Wawrzynczak, Angel Pons, Arthur Heymans, Lean Sheng Tan.
Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63624 )

Change subject: soc/intel/cmn/fast_spi: Add API to check if SPI Cycle In Progress
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Patch Set 1:

(1 comment)

File src/soc/intel/common/block/fast_spi/fast_spi_flash.c:

https://review.coreboot.org/c/coreboot/+/63624/comment/d3bc134d_f2daf39f 
PS1, Line 168: enum errors
All across the file 'int' is used for ret (which is the return type of the function as well). Why do you switch to 'enum errors' here?
If there is a valid value for that the I guess we could do that consistent in the whole file in a follow-up?