Fastmap update v2 (pile 5)

[Richard Weinberger]

Artem,

this is pile 5 of 7.

[PATCH 1/6] UBI: Add initial support for fastmap self checks
[PATCH 2/6] UBI: Fastmap: Enhance fastmap checking
[PATCH 3/6] UBI: Fix stale pointers in ubi->lookuptbl
[PATCH 4/6] UBI: Fastmap: Add self check to detect absent PEBs
[PATCH 5/6] UBI: Fastmap: Make self_check_eba() depend on fastmap
[PATCH 6/6] UBI: Fastmap: Add new module parameter fm_debug

Thanks,
//richard