This config right now contains only kernel options for earlyprintk,
which makes it easier for UART debugging requested by kernel developers.

Add work in progress patch, which needs to be polished, so we can send
this to upstream later.

Fixes: #347

[1] https://github.com/openwrt/openwrt/commit/f8fa38c13fcc3b4ce9a4dfc56d98e5188353afac

Now, it is the same  with Turris Omnia.

Let's see if this is still required

- Add/rebase/remove patches from OpenWrt master branch

Will do this the trick?

It seems that our build script does not count with subfolders, which is
somehow expected, but I dont realize that. Let's move them to one folder
top.