lib/igt_kms: Add more braces around macros

The next patch wants to call for_each_pipe_with_valid_output
with *pipe and *output, this fails miserably without these braces.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
1 file changed