ARM: decompressor: Enable unaligned memory access for v6 and above
ext4: merge changes for 'fs/ext4/ialloc.c' from previous upstream patch

  * ext4: use atomic64_t for the per-flexbg free_clusters count
  * ext4: fixup 64-bit divides in 3.0-stable backport of upstream fix
  * This commit fixes build breakage from previous Upstream Patch