"plasma" and some related packages are currently missing in Alpine edge
armv7 due to a cyclic dependency. Let's disable all packages depending
on plasma for armv7 temporarily, to get the pmOS edge armv7 repo up
again.
[ci:skip-build], [ci:skip-vercheck]: only arch line changed
Related: build.postmarketos.org#72
Fails to build, because extra-cmake-modules from Alpine is not available
for armhf. Its APKBUILD says "Blocked by qt5-qtdeclarative".
[ci:skip-vercheck]