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

This reverts commit d4fc94efe0923265383ae8e40632fc28e2318c51.
Revert "ARM: 7668/1: fix memset-related crashes caused by recent GCC (4.7.2) optimizations"

This reverts commit b52702bd74b80fc21b074e8fb8bdaacdfd94c8b5.
Revert "improve the performance of memcpy and memmove of the general version"

This reverts commit 0e7ef4cf17d417cafb4c80cd7a5facab270cf82d.
Revert "Compilar con Toolchain Linaro 4.8"

This reverts commit 1747269072c58c6b45509a07a2b71e42b03bfe13.