update checkpatch.pl to version 0.03

This version brings a host of changes to cure false positives and
bugs detected on patches submitted to lkml and -mm.  It also brings
a number of new tests in response to reviews, of particular note:

  - catch use of volatile
  - allow deprecated functions to be listed in feature-removal-schedule.txt
  - warn about #ifdef's in c files
  - check that spinlock_t and struct mutex use is commented
  - report on architecture specific defines being used
  - report memory barriers without an associated comment

Full changelog:

      catch use of volatile
      convert other quoted string checks to common routine
      alloc deprecated functions to be listed in feature-removal-schedule.txt
      split out the line length and indent for each line
      improve switch block handling
      handle GNU diff context lines with no leading space
      warn about #ifdef's in c files
      tidy up tests for signed-off-by using raw mode
      check that spinlock_t and struct mutex use is commented
      syntax checks for open brace placement may drop off the bottom of hunk
      report memory barriers without an associated comment
      when a sign off is present but ugly do not report it missing
      do not mistake bitfield definitions for indented labels
      report on architecture specific defines being used
      major update to the operator checks
      prevent switch/if/while etc matching foo_switch
      generify assignement in condition error message
      introduce an operator context marker
      Version: 0.03
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>