A Greybus host device has a pool of CPort Ids it can use. When we
establish a connection with a CPort on another module we will need
to allocate one from those that are available.
This patch adds a bitmap to the greybus host device structure that
allows cport ids to be allocated and freed as needed.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>