interface: rename greybus_interface_block_id to greybus_interface_id

This moves the id structure name to not have "block" in it, as that
doesn't make sense anymore with the renaming of the gb_interface
structure.

Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
interface.h: remove unused #defines

MAX_CPORTS_PER_MODULE and MAX_STRINGS_PER_MODULE are not used anywhere
anymore, so remove them lest someone thing we have limits.

Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
greybus_id.h: minor typo fixes

Align up the BIT() #defines and properly comment the include block
define.

Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>