[M] Change in flashrom[master]: ichspi.c: Read chip ID and use it to populate `flash->chip`

[Subrata Banik (Code Review)]

Attention is currently required from: Edward O'Callaghan, Angel Pons, Nikolai Artemiev.

Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/69195 )

Change subject: ichspi.c: Read chip ID and use it to populate `flash->chip`
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Patch Set 9:

(1 comment)

Commit Message:

https://review.coreboot.org/c/flashrom/+/69195/comment/11eb0f42_f6d40c02 
PS2, Line 7: ichspi.c: Read chip ID and use it to identify chip
> Maybe we should just print a warning if >1 chip is detected?
>
> Subrata, do you have any thoughts on this?

Ideally as per descriptor, there can be 2 SPI flash and we need to drive CS PIN low to initiate the READ JEDEC ID (0x9F) HW seq command for each SPI flash chip to capture the response.