drm/tegra: gem: Remove some dead code

dma_buf_map_attachment() never returns NULL, so there is no need to
check for it.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Christophe JAILLET 2016-10-30 16:50:29 +01:00 • committed by Thierry Reding
commit cc09cb6da9