Revert "Squash out Kernel Neon Support"

This reverts commit 7a79af710a31dd129d7ddd50dea11876071012f0.
Revert "ARM: add support for kernel mode NEON"

This reverts commit 530a18209c9d9dc04d01e3fbdb71c2c5966797a3.
Squash out Kernel  Neon Support