tools headers: Follow the upstream UAPI header version 100% differ from the kernel

Remove this from check-headers.sh:

  opts="--ignore-blank-lines --ignore-space-change"

as the easiest policy is to just follow the upstream UAPI header version 100%.
Pure space-only changes are comparatively rare.
Signed-off-by: NIngo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/r/20171121084111.y6p5zwqso2cbms5s@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/check-headers.sh

@@ -45,7 +45,6 @@ include/uapi/asm-generic/mman-common.h
 
 check () {
   file=$1
-  opts="--ignore-blank-lines --ignore-space-change"
 
   shift
   while [ -n "$*" ]; do