drm/amdgpu: mark soft recovered fences with -ENODATA

Set the fence error code before trying to soft-recover it.

It gets overwritten when a hard recovery is required.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>