mctp: add Eid parameter to multi_protocol LoopbackSender

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

target/ast10x0/tests/mctp/multi_protocol/server_main.rs

diff --git a/target/ast10x0/tests/mctp/multi_protocol/server_main.rs b/target/ast10x0/tests/mctp/multi_protocol/server_main.rs
index 454d188..e4800ba 100644
--- a/target/ast10x0/tests/mctp/multi_protocol/server_main.rs
+++ b/target/ast10x0/tests/mctp/multi_protocol/server_main.rs
@@ -49,6 +49,7 @@
 impl Sender for LoopbackSender<'_> {
     fn send_vectored(
         &mut self,
+        _eid: mctp::Eid,
         mut fragmenter: Fragmenter,
         payload: &[&[u8]],
     ) -> mctp::Result<mctp::Tag> {