Change in flashrom[master]: dummyflasher.c: Extract params processing into a separate function

[Angel Pons (Code Review)]

Attention is currently required from: Nico Huber, Namyoon Woo, Edward O'Callaghan, Anastasia Klimchuk.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/54748 )

Change subject: dummyflasher.c: Extract params processing into a separate function
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Patch Set 2:

(3 comments)

Patchset:

PS2: 
I'm sorry that you'll have to manually rebase this change, but I *really* had to make CB:54905 CB:54908 CB:54909 CB:54910 to blow off some steam after noticing these issues.

File dummyflasher.c:

https://review.coreboot.org/c/flashrom/+/54748/comment/1d5e1d11_ac41efe2 
PS2, Line 971: free(status);
             : 		if (errno != 0 || status == endptr) {
> For another patch: this has an use-after-free bug, just like the one CB:46551 fixed.

CB:54909 takes care of it.

https://review.coreboot.org/c/flashrom/+/54748/comment/a55b7321_2bda9960 
PS2, Line 1014:
> I would initialise `data->flashchip_contents` here: […]

I moved around the initialisation in CB:54908