drm/tegra: Add 3D support

Initialize and power the 3D unit on Tegra20, Tegra30 and Tegra114 and
register a channel with the Tegra DRM driver so that the unit can be
used from userspace.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index e62c61a..f5dd56f 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -26,6 +26,7 @@
 	HOST1X_CLASS_HOST1X = 0x1,
 	HOST1X_CLASS_GR2D = 0x51,
 	HOST1X_CLASS_GR2D_SB = 0x52,
+	HOST1X_CLASS_GR3D = 0x60,
 };
 
 struct host1x_client;