[flashrom-gerrit] Change in flashrom[staging]: make args for -r/-w/-v non-positional and optional

[David Hendricks (Code Review)]

David Hendricks has posted comments on this change. ( https://review.coreboot.org/19387 )

Change subject: make args for -r/-w/-v non-positional and optional
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Patch Set 1: Code-Review-1

needs polish, mostly just uploaded for convenience.