drm/tilcdc: Fix checkpatch error in tilcdc_panel.c

Fixes the following checkpatch error:
ERROR: "foo * bar" should be "foo *bar"

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>