drm/drv: propagate errors from drm_modeset_register_all()

drm/drv: propagate errors from drm_modeset_register_all()

[ Upstream commit 5f8dec200923a76dc57187965fd59c1136f5d085 ]

In case the drm_modeset_register_all() function fails, its error code
will be ignored. Instead make the drm_dev_register() bail out in case of
such an error.

Fixes: 79190ea2658a ("drm: Add callbacks for late registering")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231202225552.1283638-1-dmitry.baryshkov@linaro.org
Signed-off-by: Sasha Levin <sashal@kernel.org>