drm/tegra: Remove host1x drm_bus implementation

The DRM core can now cope with drivers that don't have an associated
struct drm_bus, so the host1x implementation is no longer useful.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --cc drivers/gpu/drm/tegra/Makefile
Simple merge

diff --cc drivers/gpu/drm/tegra/bus.c
Simple merge

diff --cc drivers/gpu/drm/tegra/dc.c
Simple merge

diff --cc drivers/gpu/drm/tegra/drm.c
Simple merge

diff --cc drivers/gpu/drm/tegra/drm.h
Simple merge

diff --cc drivers/gpu/drm/tegra/dsi.c
Simple merge

diff --cc drivers/gpu/drm/tegra/gr2d.c
Simple merge

diff --cc drivers/gpu/drm/tegra/gr3d.c
Simple merge

diff --cc drivers/gpu/drm/tegra/hdmi.c
Simple merge

diff --cc drivers/gpu/drm/tegra/sor.c
Simple merge