drm/panfrost: remove DRM_AUTH and respective comment

As of earlier commit we have address space separation. Yet we forgot to
remove the respective comment and DRM_AUTH in the ioctl declaration.

Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Steven Price <steven.price@arm.com>
Fixes: 7282f764 ("drm/panfrost: Implement per FD address spaces")
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191101130313.8862-4-emil.l.velikov@gmail.com

drivers/gpu/drm/panfrost/panfrost_drv.c

@@ -451,15 +451,11 @@ panfrost_postclose(struct drm_device *dev, struct drm_file *file)
 	kfree(panfrost_priv);
 }
 
-/* DRM_AUTH is required on SUBMIT for now, while all clients share a single
- * address space.  Note that render nodes would be able to submit jobs that
- * could access BOs from clients authenticated with the master node.
- */
 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 #define PANFROST_IOCTL(n, func, flags) \
 	DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
 
-	PANFROST_IOCTL(SUBMIT,		submit,		DRM_RENDER_ALLOW | DRM_AUTH),
+	PANFROST_IOCTL(SUBMIT,		submit,		DRM_RENDER_ALLOW),
 	PANFROST_IOCTL(WAIT_BO,		wait_bo,	DRM_RENDER_ALLOW),
 	PANFROST_IOCTL(CREATE_BO,	create_bo,	DRM_RENDER_ALLOW),
 	PANFROST_IOCTL(MMAP_BO,		mmap_bo,	DRM_RENDER_ALLOW),