anv/xe: return failure in case waiting for the vm_bind syncobj fails

anv/xe: return failure in case waiting for the vm_bind syncobj fails

Don't hide failures, we have xe.ko bugs related to that, such as:
    https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/496

The bind ioctl may fail if the application does something wrong, but
the wait really should never fail.

v2: Don't print an error message (Lionel).

Reviewed-by: José Roberto de Souza <jose.souza@intel.com> (v1)
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24681>