components/linux.bst: PinePhone Pro configs (**backport**)
This is a backport of two MR's:
The first MR adds the necessary configs to the master branch that boots both the PinePhone Pro and PinePhone. The second MR is a syntax fix because we should be using the updated "case "$arch" in" syntax over the original "case "%{arch}" in" syntax from the original buildstream file.
CC:
Edited by Tanvir Roshid