Staging: ccg: delete it from the tree

Now that it isn't in the build, just delete the ccg driver from the tree
entirely.

Cc: John Stultz <john.stultz@linaro.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>