Revert "misc fixes+use Cortex-A8 optimised toolchain thanks to @Christopher83"

This reverts commit 3a7511803d4ea1f0576398af6d77330bdbeca54d.
Revert "Fix previous commit"

This reverts commit a463458c5c8186173212e11a86c1fc61596070a7.
Revert "Use extra toolchain for Kernel"

This reverts commit cf3ba3ce2f13f390d88869d17804486d69687045.