We now limit the maximum value for both host and module CPort ids,
and we know they can always be represented in a single byte.
Make use of this by using only one of the two pad bytes for encoding
the CPort id in a message header.
(Note that we have never used a CPort higher than 255. Encoding
such a small CPort id in little endian 2-byte format has the same
result as what is done here.)
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>