drm/debugfs: Fix drm_debugfs_remove_files() stub

When building without CONFIG_DEBUG_FS:

  drivers/gpu/drm/tegra/dc.c:1757:59: error: too many arguments to function call, expected 3, have 4
   1757 |         drm_debugfs_remove_files(dc->debugfs_files, count, root, minor);
        |         ~~~~~~~~~~~~~~~~~~~~~~~~                                 ^~~~~
  include/drm/drm_debugfs.h:162:19: note: 'drm_debugfs_remove_files' declared here
    162 | static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
        |                   ^                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    163 |                                            int count, struct drm_minor *minor)
        |                                            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  1 error generated.

Update the stub to include the root parameter.

Fixes: 8e455145 ("drm/debugfs: rework drm_debugfs_create_files implementation v2")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230913-fix-drm_debugfs_remove_files-stub-v1-1-6b952ac559f3@kernel.orgSigned-off-by: Christian König <christian.koenig@amd.com>

include/drm/drm_debugfs.h

@@ -160,7 +160,8 @@ static inline void drm_debugfs_create_files(const struct drm_info_list *files,
 {}
 
 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
-					   int count, struct drm_minor *minor)
+					   int count, struct dentry *root,
+					   struct drm_minor *minor)
 {
 	return 0;
 }