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

[Nico Huber (Code Review)]

Nico Huber 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 7:

The changes to flashrom.c and layout.c seem to belong into the previous
commit. If it's too hard to untangle, maybe just squash them?