drm: Always enable atomic API

Now that the interface has been proven by a port of Weston (using all
atomic features including TEST_ONLY), remove the module parameter
guarding the atomic API from being exposed, and let it run free in the
wild.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_drv.c

@@ -46,13 +46,11 @@ MODULE_AUTHOR(CORE_AUTHOR);
 MODULE_DESCRIPTION(CORE_DESC);
 MODULE_LICENSE("GPL and additional rights");
 MODULE_PARM_DESC(debug, "Enable debug output");
-MODULE_PARM_DESC(atomic, "Enable experimental atomic KMS API");
 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)");
 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
 MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
 
 module_param_named(debug, drm_debug, int, 0600);
-module_param_named_unsafe(atomic, drm_atomic, bool, 0600);
 
 static DEFINE_SPINLOCK(drm_minor_lock);
 static struct idr drm_minors_idr;

drivers/gpu/drm/drm_ioctl.c

@@ -350,9 +350,6 @@ drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
 		file_priv->universal_planes = req->value;
 		break;
 	case DRM_CLIENT_CAP_ATOMIC:
-		/* for now, hide behind experimental drm.atomic moduleparam */
-		if (!drm_atomic)
-			return -EINVAL;
 		if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
 			return -EINVAL;
 		if (req->value > 1)