Revert "ARM: 7670/1: fix the memset fix"

This reverts commit 66ac3eb53123faab4cd623755d4183425198d2fd.
Revert "makefile: kernel faults with -fschedule-insns2 in GCC 4.8.2"

This reverts commit b2084ff08aa782bb5e999498b834c211e5434159.
Revert "ARM: 7668/1: fix memset-related crashes caused by recent GCC (4.7.2) …"

This reverts commit 234209179391f0a8954aa5bda4b58c6a81d060bb.
Remove HEAD
implemented triangle away support