Revert "drm/etnaviv: submit supports performance monitor requests"

The performance monitoring feature isn't stable enough yet, so don't advertise
it to userspace yet.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drivers/gpu/drm/etnaviv/etnaviv_drv.c

@@ -550,7 +550,7 @@ static struct drm_driver etnaviv_drm_driver = {
 	.desc               = "etnaviv DRM",
 	.date               = "20151214",
 	.major              = 1,
-	.minor              = 2,
+	.minor              = 1,
 };
 
 /*