drm/aspeed: Drop aspeed_gfx->fbdev

No longer used since the conversion to generic fbdev.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Andrew Jeffery <andrew@aj.id.au>
Cc: linux-aspeed@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://patchwork.freedesktop.org/patch/msgid/20200415074034.175360-55-daniel.vetter@ffwll.ch

drivers/gpu/drm/aspeed/aspeed_gfx.h

@@ -12,7 +12,6 @@ struct aspeed_gfx {
 
 	struct drm_simple_display_pipe	pipe;
 	struct drm_connector		connector;
-	struct drm_fbdev_cma		*fbdev;
 };
 
 int aspeed_gfx_create_pipe(struct drm_device *drm);