drm/etnaviv: switch to postclose

I didn't spot anything that would require ordering here (well not
anywhere else either), and I'm trying to unify at least modern drivers
on one close hook.

Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Russell King <linux+etnaviv@armlinux.org.uk>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: etnaviv@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Acked-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drivers/gpu/drm/etnaviv/etnaviv_drv.c

@@ -111,7 +111,7 @@ static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
 	return 0;
 }
 
-static void etnaviv_preclose(struct drm_device *dev, struct drm_file *file)
+static void etnaviv_postclose(struct drm_device *dev, struct drm_file *file)
 {
 	struct etnaviv_drm_private *priv = dev->dev_private;
 	struct etnaviv_file_private *ctx = file->driver_priv;
@@ -488,7 +488,7 @@ static struct drm_driver etnaviv_drm_driver = {
 				DRIVER_PRIME |
 				DRIVER_RENDER,
 	.open               = etnaviv_open,
-	.preclose           = etnaviv_preclose,
+	.postclose           = etnaviv_postclose,
 	.gem_free_object_unlocked = etnaviv_gem_free_object,
 	.gem_vm_ops         = &vm_ops,
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,