drm/amdgpu: add HDP ip block for HDP 4.4.2

Add HDP IP handling for HDP 4.4.2
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Le Ma <Le.Ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2305,6 +2305,7 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
 	case IP_VERSION(4, 2, 0):
 	case IP_VERSION(4, 2, 1):
 	case IP_VERSION(4, 4, 0):
+	case IP_VERSION(4, 4, 2):
 		adev->hdp.funcs = &hdp_v4_0_funcs;
 		break;
 	case IP_VERSION(5, 0, 0):