Revert "mm: Add UKSM 0.1.2.2"

This reverts commit 15f2f21a3c1f28b2af8b7b836e0cf37de12b3e20.
Revert "defconfigs: Enable UKSM"

This reverts commit ed9a3dcc40e3854887d406f4576791a802b751c2.
Merge branch '3.0.31' into 3.0.31-plus_oc