staging: vc04_services: vchiq_arm: Split driver static and runtime data

vchiq_drvdata combines two types of book-keeping data. There is
platform-specific static data (for e.g. cache lines size) and then
data needed for book-keeping at runtime.

Split the data into two structures: struct vchiq_platform_info and
struct vchiq_drv_mgmt. The vchiq_drv_mgmt is allocated at runtime
during probe and will be extended in subsequent patches to remove
all global variables allocated.

No functional changes intended in this patch.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20240412075743.60712-3-umang.jain@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>