interface.rmcp: allow SEND_MESSAGE answer to arrive in the next packet
interface.rmcp: allow SEND_MESSAGE answer to arrive in the next packet

The first reply acknowledges reception of the SEND_MESSAGE request from the
bridge, while the second one contains the forwarded reply

Signed-off-by: Emilio Perez <1f307e37f7fa9e0bb74e8755bbf86f20ad81a2cb@diamond.ac.uk>

kontron/python-ipmi