drm/radeon: NULL noise: drivers/gpu/drm/radeon/radeon_*.c

Fix this sparse warning:
  drivers/gpu/drm/radeon/r600_cp.c:1811:52: warning: Using plain integer as NULL pointer
  drivers/gpu/drm/radeon/radeon_cp.c:1363:52: warning: Using plain integer as NULL pointer
  drivers/gpu/drm/radeon/radeon_state.c:1983:61: warning: Using plain integer as NULL pointer

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/r600_cp.c b/drivers/gpu/drm/radeon/r600_cp.c
index be2bba66d5d9..6f2cc74350c5 100644
--- a/drivers/gpu/drm/radeon/r600_cp.c
+++ b/drivers/gpu/drm/radeon/r600_cp.c
@@ -1811,7 +1811,7 @@ int r600_do_cleanup_cp(struct drm_device *dev)
 
                 if (dev_priv->gart_info.gart_table_location == DRM_ATI_GART_FB) {
                         drm_core_ioremapfree(&dev_priv->gart_info.mapping, dev);
-                        dev_priv->gart_info.addr = 0;
+                        dev_priv->gart_info.addr = NULL;
                 }
         }
         /* only clear to the start of flags */