staging: sm750fb: remove clear method from lynxfb_{crtc,output}

The clear methods of lynxfb_crtc and lynxfb_output are empty and
therefore they can be removed.

Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 files changed