panvk: Force a preload when the render area is not 32x32 aligned

If we don't do that, we lose the content that's outside the defined
render area but inside the 32x32 aligned render area.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29443>
1 file changed