[M] Change in flashrom[master]: tree/: Drop default_spi_probe_opcode for NULL case

[Felix Singer (Code Review)]

Attention is currently required from: Thomas Heijligen, Edward O'Callaghan, Peter Marheine.

Felix Singer has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/70264 )

Change subject: tree/: Drop default_spi_probe_opcode for NULL case
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Patch Set 1:

(1 comment)

Commit Message:

https://review.coreboot.org/c/flashrom/+/70264/comment/009cd79f_82dc57d3 
PS1, Line 9: A NULL func pointer is necessary and sufficient for the
Maybe give a bit more context about what the default function does. Suggestion:

Instead of using a function that returns true for the default case,
  just use a null pointer since it's sufficient for that and thus this
  boilerplate is not needed.