v3d/packet: fix typo on Set InstanceID/PrimitiveID packet

Fixes: 276d22c52 ("v3d: Add some more new packets for V3D 4.x.")

CC: 20.2 20.1 <mesa-stable@lists.freedesktop.org>

Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6447>
1 file changed