greybus.h: remove transfer_flags

We didn't use them, so drop it.

Also some other checkpatch cleanups while I was in there.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
greybus_id.h: checkpatch cleanup
svc_msg.h: add bsd license to file so that firmware can use it.