drm/udl: 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.

v5:
- select DRM_CLIENT_SELECTION

Signed-off-by: Thomas Zimmermann <[e-mail]>
Cc: Dave Airlie <[e-mail]>
Cc: Sean Paul <[e-mail]>
Cc: Thomas Zimmermann <[e-mail]>
Acked-by: Javier Martinez Canillas <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/udl/Kconfig

···
 	depends on USB
 	depends on USB_ARCH_HAS_HCD
 	depends on MMU
+	select DRM_CLIENT_SELECTION
 	select DRM_GEM_SHMEM_HELPER
 	select DRM_KMS_HELPER
 	help

drivers/gpu/drm/udl/udl_drv.c

···
 #include <linux/module.h>
 
 #include <drm/drm_drv.h>
+#include <drm/drm_client_setup.h>
 #include <drm/drm_fbdev_shmem.h>
 #include <drm/drm_file.h>
 #include <drm/drm_gem_shmem_helper.h>
···
 	.fops = &udl_driver_fops,
 	DRM_GEM_SHMEM_DRIVER_OPS,
 	.gem_prime_import = udl_driver_gem_prime_import,
+	DRM_FBDEV_SHMEM_DRIVER_OPS,
 
 	.name = DRIVER_NAME,
 	.desc = DRIVER_DESC,
···
 
 	DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
 
-	drm_fbdev_shmem_setup(&udl->drm, 0);
+	drm_client_setup(&udl->drm, NULL);
 
 	return 0;
 }