drm/ingenic: Run DRM default client setup

Call drm_client_setup() to run the kernel's default client setup
for DRM. Set fbdev_probe in struct drm_driver, so that the client
setup can start the common fbdev client.

The ingenic driver specifies a preferred color mode of 32. As this
is the default if no format has been given, leave it out entirely.

v5:
- select DRM_CLIENT_SELECTION

Signed-off-by: Thomas Zimmermann <[e-mail]>
Cc: Paul Cercueil <[e-mail]>
Acked-by: Paul Cercueil <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/ingenic/Kconfig

···
 	depends on OF
 	depends on COMMON_CLK
 	select DRM_BRIDGE
+	select DRM_CLIENT_SELECTION
 	select DRM_PANEL_BRIDGE
 	select DRM_KMS_HELPER
 	select DRM_DISPLAY_HELPER

drivers/gpu/drm/ingenic/ingenic-drm-drv.c

···
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_bridge_connector.h>
+#include <drm/drm_client_setup.h>
 #include <drm/drm_color_mgmt.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_damage_helper.h>
···
 	.fops			= &ingenic_drm_fops,
 	.gem_create_object	= ingenic_drm_gem_create_object,
 	DRM_GEM_DMA_DRIVER_OPS,
+	DRM_FBDEV_DMA_DRIVER_OPS,
 };
 
 static const struct drm_plane_funcs ingenic_drm_primary_plane_funcs = {
···
 		goto err_clk_notifier_unregister;
 	}
 
-	drm_fbdev_dma_setup(drm, 32);
+	drm_client_setup(drm, NULL);
 
 	return 0;