media: renesas: vsp1: Make HSI and HST modules optional

media: renesas: vsp1: Make HSI and HST modules optional

Not all VSP instance incorporate the HSI and HST modules. Add a
VSP1_HAS_HSIT feature flag, and create the modules only on VSP instances
that implement them.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20250429232904.26413-3-laurent.pinchart+renesas@ideasonboard.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>