drm/amd/pm: Set no fan control flag as needed.

For GPUs that don't support fan control, set the no fan control flag so
that they don't appear in hwmon sensors.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

@@ -1028,6 +1028,10 @@ static int smu_sw_init(void *handle)
 		return ret;
 	}
 
+	/* If there is no way to query fan control mode, fan control is not supported */
+	if (!smu->ppt_funcs->get_fan_control_mode)
+		smu->adev->pm.no_fan = true;
+
 	return 0;
 }