If probe fails after IOMMU is attached, we need to detach in order to
clean up properly.  Before this change, IOMMU faults would occur if the
probe failed (-EPROBE_DEFER).
Signed-off-by: NStephane Viau <sviau@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>