[SKIP SOF-TEST] xtensa-build-zephyr.py: move PTL out of "all" and into "extra".#9266

kv2019i merged 2 commits intothesofproject:mainthesofproject/sof:mainfrom

marc-hb:ptl-is-extramarc-hb/sof:ptl-is-extraCopy head branch name to clipboard