drm/amd/display: Add DMUB support for DCN314

Initialize DMUB for DCN 3.1.4.
Use same funcs as DCN31.

Signed-off-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

@@ -223,6 +223,7 @@ static bool dmub_srv_hw_setup(struct dmub_srv *dmub, enum dmub_asic asic)
 
 	case DMUB_ASIC_DCN31:
 	case DMUB_ASIC_DCN31B:
+	case DMUB_ASIC_DCN314:
 	case DMUB_ASIC_DCN315:
 	case DMUB_ASIC_DCN316:
 		if (asic == DMUB_ASIC_DCN315)