drm/amdgpu: bump driver version for cleared VRAM

Driver now clears VRAM on allocation.  Bump the
driver version so mesa knows when it will get
cleared vram by default.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.11.x