staging: vchi: Get rid of struct vchi_service

The structure only contains a single parameter, which is the underlying
vchiq handle. Get rid of the struct and directly pass the handle around.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629150945.10720-32-nsaenzjulienne@suse.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>