drm: Replace pitch with pitches[] in drm_framebuffer

Otherwise each driver would need to keep the information inside
their own framebuffer object structure. Also add offsets[]. BOs
on the other hand are driver specific, so those can be kept in
driver specific structures.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 9337e5e..73893e5 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -119,7 +119,7 @@
 	overlay->fb_width = fb->width;
 	overlay->fb_height = fb->height;
 	overlay->bpp = fb->bits_per_pixel;
-	overlay->pitch = fb->pitch;
+	overlay->pitch = fb->pitches[0];
 
 	/* set overlay range to be displayed. */
 	overlay->crtc_x = pos->crtc_x;