fs/cramfs: code clean-up

Fixes some checkpatch errors/warnings:

  WARNING: Missing a blank line after declarations
  ERROR: spaces required around that '=' (ctx:VxV)
  ERROR: "foo * bar" should be "foo *bar"
  ERROR: space prohibited after that open parenthesis '('

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>