Revert "jenad: adjust defconfig for PMEM_ADSP"

This reverts commit 5124be6bf3af4907ec840eb03f2569e2dad65156.
Revert "misc: Add support for PMEM ADSP (overriding ION)."

This reverts commit 4a7fd809189eba10be952bae2c19417342620fa9.