Documentation/gpu: use code-block with proper language

Now that we don't have automatic syntax highlighting, use the code-block
directive with the explicitly selected language, where appropriate.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst
index bca808535dfd..cb5daffcd6be 100644
--- a/Documentation/gpu/drm-mm.rst
+++ b/Documentation/gpu/drm-mm.rst
@@ -45,7 +45,7 @@ the radeon_ttm.c file for an example of usage.
 
 The ttm_global_reference structure is made up of several fields:
 
-::
+.. code-block:: c
 
               struct ttm_global_reference {
                       enum ttm_global_types global_type;