[XL] Change in flashrom[master]: tree/: Convert flashchips db to use indirection for erase_block

[Edward O'Callaghan (Code Review)]

Attention is currently required from: Anastasia Klimchuk.

Edward O'Callaghan has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/69131 )

Change subject: tree/: Convert flashchips db to use indirection for erase_block
......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2:
> O-oh? Y-you did it, Edward... Thank you so much for giving this idea a try! 😊 […]

Thank you for taking the time to review and suggest the idea. I can confirm the above results in identical binaries pre-post this change.

```
└──╼ sha256sum flashrom.bin flashrom
98488c7f35f3fcdef9029fd2acb8f93e0af3daf25291ff325cec81883db14927  flashrom.pre
98488c7f35f3fcdef9029fd2acb8f93e0af3daf25291ff325cec81883db14927  flashrom
```