core: Add TX/RX API that exposes message tag and tag owner

MCTP received packets can carry a message tag and tag owner bit
which is set by a remote MCTP endpoint. This can be used by the
remote MCTP endpoint to track the responses. Thus, libmctp should
provide a mechanism for the upper layer MCTP applications to
respond with the same message tag.

This patchset extends TX and RX API with message tag and
tag owner bits.

Signed-off-by: Sumanth Bhat <sumanth.bhat@linux.intel.com>
Change-Id: I6d07eafa86c653abdd4313ab7cc77e5a93124477
diff --git a/tests/test_eid.c b/tests/test_eid.c
index 031d044..5c089ad 100644
--- a/tests/test_eid.c
+++ b/tests/test_eid.c
@@ -16,7 +16,9 @@
 	mctp_eid_t			src_eid;
 };
 
-static void test_rx(uint8_t eid, void *data, void *msg, size_t len)
+static void
+test_rx(uint8_t eid, bool tag_owner __unused, uint8_t msg_tag __unused,
+	void *data, void *msg __unused, size_t len __unused)
 {
 	struct test_ctx *ctx = data;