drm: Prefer sizeof(type) over sizeof type

sizeof(type) is the variant used most commonly and required by
checkpatch.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --cc drivers/gpu/drm/drm_crtc.c
Simple merge

diff --cc drivers/gpu/drm/drm_irq.c
Simple merge