anv: fix incorrect parameter

cmd_buffer_update_dirty_vbs_for_gfx8_vb_flush takes a value RANDOM/SEQUENTIAL. Not a boolean.
Fortunately this worked okay because true == RANDOM

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20497>
(cherry picked from commit 4246a519f3b900fa64b722f76d0808ca899d668e)
2 files changed