drm/sti: code clean up

Purpose is to simplify the STI driver:
- remove layer structure
- consider video subdev as part of the compositor (like mixer subdev)
- remove useless STI_VID0 and STI_VID1 enum

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>

drivers/gpu/drm/sti/sti_gdp.h

@@ -11,6 +11,7 @@
 
 #include <linux/types.h>
 
-struct sti_layer *sti_gdp_create(struct device *dev, int id);
+struct sti_plane *sti_gdp_create(struct device *dev, int desc,
+				 void __iomem *baseaddr);
 
 #endif