Change in flashrom[master]: ichspi: Introduce FCYCLE_MASK(n) macro

[Nico Huber (Code Review)]

Attention is currently required from: Subrata Banik, Angel Pons, Anastasia Klimchuk.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/62891 )

Change subject: ichspi: Introduce FCYCLE_MASK(n) macro
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Patch Set 7:

(3 comments)

File ichspi.c:

https://review.coreboot.org/c/flashrom/+/62891/comment/3998961f_9b166be6 
PS6, Line 88: Changed HSFC Control bits
These are register fields that changed with Sunrise Point, please keep things
grouped by the comments.

https://review.coreboot.org/c/flashrom/+/62891/comment/99104afd_66b8ff43 
PS6, Line 147: 4K
Not always 4K.

https://review.coreboot.org/c/flashrom/+/62891/comment/8d884e60_181b1c40 
PS6, Line 150: /*
             :  * 4 bits to represents the FCYCLE operation for PCH as:
             :  * 0: SPI Read
             :  * 2: SPI Write
             :  * 3: SPI Erase 4K
             :  * 4: SPI Erase 64K
             :  * 6: SPI RDID
             :  * 7: SPI Write Status
             :  * 8: SPI Read Status
             :   */
             : #define HSFC_FCYCLE_BIT_WIDTH_PCH	0xf
Please don't mix ICH9 with PCH100 definitions.