panvk: Rework iter_sb to be the scoreboard directly

This patch changes iter_sb to contains the actual scoreboard info
instead of the index in the iter range.

This is required to handle NEXT_SB_ENTRY on v11+.

Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35307>
6 files changed