UBIFS: introduce LPT dump function

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --cc fs/ubifs/debug.c
Simple merge

diff --cc fs/ubifs/debug.h
Simple merge

diff --cc fs/ubifs/lpt.c
Simple merge

diff --cc fs/ubifs/lpt_commit.c
Simple merge

diff --cc fs/ubifs/ubifs.h
Simple merge