drm/plane: Use consistent data types for format count

Rather than a mix of the the sized uint32_t and signed integer, use an
unsized unsigned int to specify the format count.

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/i915/intel_display.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/dispnv04/overlay.c
Simple merge

diff --cc include/drm/drm_crtc.h
Simple merge