initial backport of f2fs from https://github.com/nowcomputing/f2fs-backports
f2fs-for-3.5 backport changes from https://github.com/nowcomputing/f2fs-backports
f2fs-for-3.2 backport changes from https://github.com/nowcomputing/f2fs-backports to enable 3.4 compile
evita: enable f2fs

Change-Id: Ia1bfd70d985bab733e7caade04379e4e64b2a916
fighter: enable f2fs

Change-Id: Ib93fb4270746592cf631afc0c513b2e3b6c01753
jet: enable f2fs

Change-Id: Ia9f01cc8fc370158064d89bb62e3d60784c5bd2b
ville: enable f2fs

Change-Id: I9ef673f7ed4179746dd48d5481f49201b37ceb58
m4 defconfig update