Should avoid kmalloc failures due to large number of array entries.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81991Reviewed-by: NDave Airlie <airlied@redhat.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NMichel Dänzer <michel.daenzer@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org