drm/amd/display: Promote DAL to 3.2.340

Summary:
* Remove unused tunnel BW validation
* Refactor DML21 initialization and configuration
* Fix link override sequencing when switching between DIO/HPO
* Ensure OLED minimum luminance

Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Taimur Hassan <Syed.Hassan@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Taimur Hassan

drivers/gpu/drm/amd/display/dc/dc.h

@@ -55,7 +55,7 @@ struct aux_payload;
 struct set_config_cmd_payload;
 struct dmub_notification;
 
-#define DC_VER "3.2.339"
+#define DC_VER "3.2.340"
 
 /**
  * MAX_SURFACES - representative of the upper bound of surfaces that can be piped to a single CRTC