microdev_micro_s2: Fix DOS line endings, they give my git fits

[jepler]

My git (2.20.1 on debian buster) has a lot of trouble with the content of this file, due to DOS-style line endings. Even a fresh clone claims the file is modified!

jepler@rat:/tmp$ git clone https://github.com/adafruit/circuitpython
Cloning into 'circuitpython'...
remote: Enumerating objects: 113, done.
remote: Counting objects: 100% (113/113), done.
remote: Compressing objects: 100% (86/86), done.
remote: Total 129597 (delta 64), reused 56 (delta 24), pack-reused 129484
Receiving objects: 100% (129597/129597), 77.55 MiB | 43.44 MiB/s, done.
Resolving deltas: 100% (95682/95682), done.
jepler@rat:/tmp$ cd circuitpython/
jepler@rat:/tmp/circuitpython$ git status
On branch main
Your branch is up to date with 'origin/main'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

    modified:   ports/esp32s2/boards/microdev_micro_s2/sdkconfig

no changes added to commit (use "git add" and/or "git commit -a")

Add and commit the file, which causes it to be stored in git with unix-style line endings, like all our source files.

[dhalbert]

@microdev1 Note there was a line-ending issue; we're fixing.

[dhalbert]

Thank you!