[refactoring] sourcefile 'common.c'

[hydroconstructor]

File divided to some parts. Functions with "flash" in names extracted to common_flash.c, with "option" extracted to option.c etc.
Removed unnecessary headers.
Removed one single function which was used nowhere.
And so on.
Project built under Windows and Ubuntu and seems to be working.

[hydroconstructor]

Problem with some defines... going to fix tomorrow or so.

[Nightwalker-87]

@hydroconstructor Please note that there is a PR #1216 already open, so please ensure that

1. there is no conflict with branch chipid_cleanup,
2. the all build tests pass and
3. all features remain functional.

[hydroconstructor]

In #1212 pointed:

rewrite and modularisation of: chipid.c chipid.h common.c stlink.h stm32.h

Here, I tried to rewrite and modularise common.c - splitting it to some files.
chipid_cleanup branch has common.c as single file, not divided to some parts.
Does it mean that splitting common.c not necessary right now?

Or maybe split common.c in different branch, not chipid_cleanup - and merge them later?

[Nightwalker-87]

As long as it does not conflict with HEAD in branch chipid_cleanup and is an addition to #1216 it's ok.
Please avoid/resolve the current conflicts as they will not disappear in any case and must be resolved anyway.
We can then merge step by step.