drm/nouveau: platform: update moved Tegra header

Header for tegra_powergate functions has moved to soc/tegra/pmc.h.
Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_platform.c

@@ -27,7 +27,7 @@
 #include <linux/of.h>
 #include <linux/reset.h>
 #include <linux/regulator/consumer.h>
-#include <linux/tegra-powergate.h>
+#include <soc/tegra/pmc.h>
 
 #include "nouveau_drm.h"
 #include "nouveau_platform.h"