genxml: fix border color offset field on Gfx12+

I wonder if the docs are correct for Gfx11 because this is the
generation that gave us the Bindless Sampler Heap of 4Gb. So it would
make sense that the border colors can also be placed anywhere in that
4Gb heap.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21600>
(cherry picked from commit 42e8a2c1d6ba3cae31c9829e94b2d3c48c40ab7d)
3 files changed