drm/amdgpu: update MODULE_PARM_DESC for freesync_video

To better describe what it does.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3756
Reviewed-by: Timur Kristóf <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: alexdeucher

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -960,7 +960,7 @@ module_param_named(tmz, amdgpu_tmz, int, 0444);
  */
 MODULE_PARM_DESC(
 	freesync_video,
-	"Enable freesync modesetting optimization feature (0 = off (default), 1 = on)");
+	"Adds additional modes via VRR for refresh changes without a full modeset (0 = off (default), 1 = on)");
 module_param_named(freesync_video, amdgpu_freesync_vid_mode, uint, 0444);
 
 /**