Change in flashrom[master]: cli_classic: Make -r/-w/-v argument optional

[Daniel Campello (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan, Angel Pons.
Daniel Campello has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/52362 )

Change subject: cli_classic: Make -r/-w/-v argument optional
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Patch Set 1:

(1 comment)

File cli_classic.c:

https://review.coreboot.org/c/flashrom/+/52362/comment/a038df9e_12a3bd05 
PS1, Line 140: static char *get_optional_filename(char *argv[])
> Can you leave a comment on this function what precisely it is expected to do here. […]

The diff is for a different functionality. In chromiumos you can specify a file (current flashrom), not specify a file (my proposed change here) and specify - (not in this change, and implemented by that diff) to used stdin and stdout instead of regular files for the fd.