drm/radeon: initially clear page tables

Clear page tables after allocating them in case
we don't completely fill them later.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2013-10-29 20:14:50 +01:00 • committed by Alex Deucher
commit 5b2906ecf4