drm/amdgpu/dc: Add missing Sienna_Cichlid chip id

Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2782,6 +2782,9 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 	case CHIP_NAVI14:
 	case CHIP_NAVI12:
 	case CHIP_RENOIR:
+#endif
+#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
+	case CHIP_SIENNA_CICHLID:
 #endif
 		return amdgpu_dc != 0;
 #endif