video: tegra: host: Send error codes to user space

Flush needs to send error codes to user space instead of suppressing
them.

Bug 886411

Reviewed-on: http://git-master/r/62385
(cherry picked from commit 357f4f8c8cc31713a32a26488e7f2031e5fff842)

Change-Id: Ibec16d062242d2bdc7bc57cba7b264141decffc5
Reviewed-on: http://git-master/r/63219
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
1 file changed