drm/nouveau/tegra: Don't leave GPU in reset

On Tegra186 systems with certain firmware revisions, leaving the GPU in
reset can cause a hang. To prevent this, don't leave the GPU in reset.
Signed-off-by: NMikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c

@@ -82,9 +82,6 @@ nvkm_device_tegra_power_down(struct nvkm_device_tegra *tdev)
 {
 	int ret;
 
-	reset_control_assert(tdev->rst);
-	udelay(10);
-
 	clk_disable_unprepare(tdev->clk_pwr);
 	if (tdev->clk_ref)
 		clk_disable_unprepare(tdev->clk_ref);