staging: vchiq: Move vchiq.h into include directory

To make the separation clear between vchiq's header files and vchiq.h,
which is to be used by services and is the 'public' API, move it into a
dedicated includes directory.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

Link: https://lore.kernel.org/r/20200629150945.10720-48-nsaenzjulienne@suse.de


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