drm/tegra: Relicense under GPL v2

The majority of the code in this driver is licensed under the GPL v2, so
relicense the rest under GPL v2 as well for consistency.

Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

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

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

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

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

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

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