This gets rid of the following warnings:
lib/igt_kms.c:2688: warning: Symbol name not found at the start of the comment block.
lib/igt_kms.c:2738: warning: Symbol name not found at the start of the comment block.
lib/igt_kms.c:2788: warning: Symbol name not found at the start of the comment block.
lib/igt_kms.c:2812: warning: Parameter description for igt_pipe_obj_replace_prop_blob::pipe is not used from source code comment block.
lib/igt_kms.c:2812: warning: Parameter description for igt_pipe_obj_replace_prop_blob::pipe_obj is missing in source code comment block.
lib/igt_kms.c:3794: warning: Parameter description for igt_cleanup_hotplug::mon is missing in source code comment block.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>