staging: vc04_services: Create new BCM_VIDEOCORE setting for VideoCore services.

Create a new memuconfig for Broadcom VideoCore services
since VideoCore is a general term used by Broadcom for a
large family of products that includes more then the BCM2835.

Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>