drm/tidss: 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 tidss 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: 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/tidss/Kconfig

···
 	tristate "DRM Support for TI Keystone"
 	depends on DRM && OF
 	depends on ARM || ARM64 || COMPILE_TEST
+	select DRM_CLIENT_SELECTION
 	select DRM_KMS_HELPER
 	select DRM_DISPLAY_HELPER
 	select DRM_BRIDGE_CONNECTOR

drivers/gpu/drm/tidss/tidss_drv.c

···
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_client_setup.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fbdev_dma.h>
···
 	.fops			= &tidss_fops,
 	.release		= tidss_release,
 	DRM_GEM_DMA_DRIVER_OPS_VMAP,
+	DRM_FBDEV_DMA_DRIVER_OPS,
 	.name			= "tidss",
 	.desc			= "TI Keystone DSS",
 	.date			= "20180215",
···
 		goto err_irq_uninstall;
 	}
 
-	drm_fbdev_dma_setup(ddev, 32);
+	drm_client_setup(ddev, NULL);
 
 	dev_dbg(dev, "%s done\n", __func__);