staging: vc04_services: Rename VCHIQ_CALLBACK_T to vchiq_callback

Renames VCHIQ_CALLBACK_T to vchiq_callback to match kernel code style.

Signed-off-by: Jamal Shareef <jamal.k.shareef@gmail.com>
Link: https://lore.kernel.org/r/6abe37fb39f896b257d7b370e1c2ad861ed8b675.1572994235.git.jamal.k.shareef@gmail.com


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