The gtt_end is already inclusive, we don't need to subtract one here.

v2 (chk): keep the fix for the VM code, cause here it really applies.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAnatoli Antonovitch <anatoli.antonovitch@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>