drm/tegra: Rename host1x_drm structure to tegra_drm

The host1x and Tegra DRM drivers are currently tightly coupled. Renaming
the structure marks the boundary more clearly.

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

diff --cc drivers/gpu/host1x/dev.c
Simple merge

diff --cc drivers/gpu/host1x/drm/dc.c
Simple merge

diff --cc drivers/gpu/host1x/drm/drm.c
Simple merge

diff --cc drivers/gpu/host1x/drm/drm.h
Simple merge

diff --cc drivers/gpu/host1x/drm/fb.c
Simple merge

diff --cc drivers/gpu/host1x/drm/gr2d.c
Simple merge

diff --cc drivers/gpu/host1x/drm/hdmi.c
Simple merge

diff --cc drivers/gpu/host1x/host1x_client.h
Simple merge