Revert "Revert "board-pico.c: use pmem_audio for userspace""

This reverts commit bc8793207d0c9d72712f165a55124a3656f862b3.
Revert "Revert "disable audio lpa and update""

This reverts commit 7fcd444f70724391182a526779bca18b87dfcb38.
Revert "Revert "disable lpa in pico board""

This reverts commit 776df185b244e8fbf677850ea4cb42189307f6f0.