Change in flashrom[master]: ichspi: Introduce HSFC CYCLE READ/WRITE/ERASE macros

[Subrata Banik (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan, Angel Pons, Anastasia Klimchuk.
Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/62868 )

Change subject: ichspi: Introduce HSFC CYCLE READ/WRITE/ERASE macros
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Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/flashrom/+/62868/comment/f4f91b0f_088dad88 
PS1, Line 9: List of changes:
           : 1. Introduced useful macros (read/write/erase/status etc.) and used
           : throughout the SPI operations.
           : 2. Drop unused macros.
           : 3. SPI operations are using `control register (offset 0x6)` hence
           : converted 32-bit reads into 16-bit read to cover the only hardware
           : sequencing control register alone.
> commit message is also misaligned with the patch content. For example (3) doesn't apply here?

rebased this CL after addressing this review comment.