checkpatch: update to version 0.22

This update brings some bigger fixes to indent checking, some fixes
for false positives, and some tightening of some tests.  Of note:

  - major fixes to indent checking including selection of the right output
    lines,
  - comment detection improved, and
  - reporting absolute filenames.

Complete changelog below.

-apw

Andy Whitcroft (17):
  checkpatch: square brackets -- exemption for array slices in braces
  checkpatch: values: double ampersand may be unary
  checkpatch: conditional indent -- labels have different indent rules
  checkpatch: switch indent allow plain return
  checkpatch: add tests for the attribute matcher
  checkpatch: ____cacheline_aligned et al are modifiers
  checkpatch: complex macros -- fix up extension handling
  checkpatch: fix up comment checks search to scan the entire block
  checkpatch: include/asm checks should be anchored
  checkpatch: reduce warnings for #include of asm/foo.h to check from
    arch/bar.c
  checkpatch: report any absolute references to kernel source files
  checkpatch: report the real first line of all suspect indents
  checkpatch: suspect indent -- skip over preprocessor, label and blank
    lines
  checkpatch: %Lx tests should hand %% as a literal
  checkpatch: report the correct lines for single statement blocks
  checkpatch: perform indent checks on perl
  checkpatch: version: 0.22