staging: vchi: Use struct vchiq_service_params

staging: vchi: Use struct vchiq_service_params

For initialization, vchi has its own params structure, which is then
translated to vchiq's params structure. They are essentially the same,
so lets directly use vchiq's.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629150945.10720-31-nsaenzjulienne@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>