Revert "ARM: 7592/1: nommu: prevent generation of kernel unaligned memory accesses"

This reverts commit 5d6428341dd83cf66bfda0a421d963edd406c89c.
Revert "ARM: 7492/1: add strstr declaration for decompressors"

This reverts commit 6f8d99866645726a5335e89a8f00af97242c7cd6.
Revert "ARM: 7493/1: use generic unaligned.h"

This reverts commit 07fcf0d3404a25de4e1bfe580ee92606746ee588.