drm: fix some kernel-doc markups

Some identifiers have different names between their prototypes
and the kernel-doc markup.

Others need to be fixed, as kernel-doc markups should use this format:
        identifier - description

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/12d4ca26f6843618200529ce5445063734d38c04.1605521731.git.mchehab+huawei@kernel.org
diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
index c0d28ba..a4bac02 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -66,8 +66,8 @@ struct drm_gem_vram_object {
 };
 
 /**
- * Returns the container of type &struct drm_gem_vram_object
- * for field bo.
+ * drm_gem_vram_of_bo - Returns the container of type
+ * &struct drm_gem_vram_object for field bo.
  * @bo:		the VRAM buffer object
  * Returns:	The containing GEM VRAM object
  */
@@ -78,8 +78,8 @@ static inline struct drm_gem_vram_object *drm_gem_vram_of_bo(
 }
 
 /**
- * Returns the container of type &struct drm_gem_vram_object
- * for field gem.
+ * drm_gem_vram_of_gem - Returns the container of type
+ * &struct drm_gem_vram_object for field gem.
  * @gem:	the GEM object
  * Returns:	The containing GEM VRAM object
  */