Revert "vfp: change to hard float"

This reverts commit ac38389256d1d1c102fef8e1f00fbe87b452aaa7.
Revert "Revert "config: enable memory group""

This reverts commit 421cc15de4830da3201ae189dee719f99911a91b.
Revert "Revert "mm: remove compressed copy from zram in-memory""

This reverts commit da3f3a256305270cf4c53396f414dcf992ecba98.