staging: vc04_services: Replace VCHIQ_INSTANCE_T typedef with struct vchiq_instance

Replaces  VCHIQ_INSTANCE_T typedef with struct vchiq_instance to match
kernel code style. Issue found by checkpatch.

Additionally, as part of the process renames "struct vchiq_instance_struct" to "struct vchiq_instance".

Signed-off-by: Jamal Shareef <jamal.k.shareef@gmail.com>
Link: https://lore.kernel.org/r/ed2b3076f93a920149716687b48e0c5e3ddf0569.1572994235.git.jamal.k.shareef@gmail.com


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