[L] Change in flashrom[master]: cli_classic: refactor arguments parsing into separate func

[Alexander Goncharov (Code Review)]

Attention is currently required from: Felix Singer, Thomas Heijligen, Edward O'Callaghan, Anastasia Klimchuk.

Alexander Goncharov has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/66343 )

Change subject: cli_classic: refactor arguments parsing into separate func
......................................................................

Patch Set 8:

(2 comments)

Commit Message:

https://review.coreboot.org/c/flashrom/+/66343/comment/5ac0df55_582bf3eb 
PS7, Line 21: TEST=builds
> I would be good to test the patch. Dummyflasher is perfectly fine for the purpose. […]

Done

File cli_classic.c:

https://review.coreboot.org/c/flashrom/+/66343/comment/6b308a35_e86afa63 
PS7, Line 51: unsigned int wp_start, wp_len;
> I think, grouping by purpose would be better than grouping by data type. […]

I see your point. Current patch stores them in the next layout:

```
operations
--
programmer + param
--
layout
--
wp
--
others
```