drm/tilcdc: Run DRM default client setup

Call drm_client_setup_with_color_mode() 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.

v5:
- select DRM_CLIENT_SELECTION
v3:
- add DRM_FBDEV_DMA_DRIVER_OPS macro

Signed-off-by: Thomas Zimmermann <[e-mail]>
Cc: Jyri Sarha <[e-mail]>
Cc: Tomi Valkeinen <[e-mail]>
Acked-by: Javier Martinez Canillas <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/tilcdc/Kconfig

···
 config DRM_TILCDC
 	tristate "DRM Support for TI LCDC Display Controller"
 	depends on DRM && OF && ARM
+	select DRM_CLIENT_SELECTION
 	select DRM_KMS_HELPER
 	select DRM_GEM_DMA_HELPER
 	select DRM_BRIDGE

drivers/gpu/drm/tilcdc/tilcdc_drv.c

···
 #include <linux/pm_runtime.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_client_setup.h>
 #include <drm/drm_debugfs.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fbdev_dma.h>
···
 		goto init_failed;
 	priv->is_registered = true;
 
-	drm_fbdev_dma_setup(ddev, bpp);
+	drm_client_setup_with_color_mode(ddev, bpp);
+
 	return 0;
 
 init_failed:
···
 static const struct drm_driver tilcdc_driver = {
 	.driver_features    = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 	DRM_GEM_DMA_DRIVER_OPS,
+	DRM_FBDEV_DMA_DRIVER_OPS,
 #ifdef CONFIG_DEBUG_FS
 	.debugfs_init       = tilcdc_debugfs_init,
 #endif