- Remove "Error" in format logging (already in pr_ level)

- Use modulename in pr_fmt instead of ROMFS: in each pr_ callsites.
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>