drm/amdgpu/dce6: fix off by one in interrupt setup

Reviewed-by: Tom St Denis <tom.stdenis@amd.com>
Reported-by: Christian Inci <chris.pcguy.inci@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-09-19 09:30:21 -04:00
commit 02124a03e6