drm/rockchip: remove redundant statement

The call to arm_iommu_detach_device() on the previous line sets
dev->archdata.mapping to NULL so this call is always a no-op.

Signed-off-by: John Keeping <john@metanate.com>
This commit is contained in:
John Keeping 2016-04-05 14:50:31 +01:00 • committed by Mark Yao
commit aa1ac27f48