greybus: gbuf: clean up logic of who owns what "part" of the gbuf

Started documenting the gbuf and how a greybus driver and a host
controller driver needs to interact with it, and the rest of the greybus
system.  It's crude documentation, but better than nothing for now...
3 files changed
tree: cdd1e4b069cc3fb3ead0e661bc8e9ba3f9f31240
  1. drivers/